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JUPITER

型号：

JUPITER

描述：

CDMA和FM （ AMPS ） I / Q滤波器的初步信息[ CDMA and FM (AMPS) I/Q Filter Preliminary Information ]

品牌：

MITEL[ MITEL NETWORKS CORPORATION ]

页数：

9 页

PDF大小：

169 K

下载PDF手册
JUPITER  
CDMA and FM (AMPS) I/Q Filter  
Preliminary Information  
DS4724 - 3.1 May 1998  
TheJUPITERcircuitisdesignedforuseindualbandanddual  
modemobilephones(CDMA/AMPS)andmeetstherequirements  
for IS-95 when used with other chips from Mitel that form the  
Planet chipset. JUPITER is an active filter incorporating circuits  
for receiving both CDMA and FM (AMPS).  
Q_OC_TEST  
Q_OC_TESTB  
QIN  
1
28  
27  
26  
25  
24  
23  
22  
21  
20  
19  
18  
17  
16  
15  
I_OC_TEST  
I_OC_TESTB  
IIN  
2
3
QINB  
4
IINB  
Q_OFFSET  
Q_OFFSETB  
5
I_OFFSET  
I_OFFSETB  
FEATURES  
6
■ Low Power and Low Voltage Operation with a  
Sleep Mode  
V
TEST  
7
V
EE  
JUPITER  
RTUNE  
ITUNE  
QTUNE  
QBAL  
8
MODE_CDMA  
ENABLE  
■ Integrated CDMA and FM Filter with Wide  
9
10  
11  
12  
13  
14  
ENTEST  
Dynamic Range  
V
REF  
■ Low Inband Gain Ripple Performance and Good  
I/Q Matching for the Filter  
QOUT  
IOUT  
QOUTB  
IOUTB  
V
CC  
V
2
EE  
ABSOLUTE MAXIMUM RATINGS  
NP28  
Supply voltage, VCC MAX  
20·7V to 15·3V  
230°C to170°C  
240°C to 1150°C  
230°C to 1125°C  
Operating temperature, TOP (at pins)  
Storage temperature, TSTG (ambient)  
Junction temperature  
Fig. 1 Pin connections - top view  
CMOS input logic high, VIH  
CMOS input logic low, VIL  
Maximum input voltage at all pins  
V
CC10·6V (Max.)  
20·6V (Min.)  
20·6V to VCC MAX10·6V  
ESD PROTECTION  
All pins are protected against electrostatic discharge to both  
supplies. At least 2kV protection is provided to MIL-STD-883D  
Method 3015.7 (human body model).  
ORDERING INFORMATION  
JUPITER-1/KG/NP1S  
I CHANNEL  
IIN  
IOUT  
MODE  
SELECT  
INPUTS  
MODE  
CONTROL  
FILTER  
CONTROL  
TUNE  
CONTROLS  
V
GC  
GAIN  
CONTROL  
QBAL  
QIN  
QOUT  
Q CHANNEL  
Fig. 2 Simplified block diagram  
JUPITER  
OPERATION  
CIRCUIT DESCRIPTION  
The block diagram of the JUPITER filter is shown in  
Fig. 3. Two tunable active low-pass gyrator filters are designed  
with balanced I/Q inputs and outputs.  
Signal inputs are DC coupled in both CDMA and FM modes.  
The device modes are selected by CMOS compatible logic  
signals as shown in Table 2. An external resistor should be  
connected between RTUNE and ground to set internal currents;  
a resistor with a tolerance of 65% and a temperature coefficient  
of less than 100ppm is recommended. VREF (pin 18) should be  
decoupled to VCC to give optimum supply rejection.  
CDMA MODE  
In CDMA mode the filter (F1 on Fig. 3) is a 7th order 0.1dB  
ripplecontinuouslytunableelliptic typewiththecornerfrequency  
tuned to 690kHz for best stop band attenuation and minimal  
phaseerror(intheoverallsystem).Variablegainstagesafterthe  
filter provide the gain control capability. Overall, each of the  
CDMA I/Q channels has 45dB nominal voltage gain with the Q  
channel having ±2dB gain adjustment range. Separate I/Q  
frequency tuning functions are built into the device.  
Atestmodeisprovidedforfiltercalibration.Inthismode,atest  
signalisappliedtotheVTEST input(pin7)withENTESTheldhigh.  
ThetestmodeisdesignedtointerfacewiththePLUTObaseband  
processor, which can provide the test signal and I/QTUNE  
voltagesandcalibratesthefiltersusinganinternalautocalibration  
algorithm. The algorithm generates two test frequencies and  
calibrates the filters to give the correct attenuation at the upper  
frequency. The calibration is normally carried out in CDMA  
mode: the FM filter performance is scaled accordingly.  
Pins are provided for DC offset control for I and Q channels  
(I_OFFSET, I_OFFSETB, Q_OFFSET and Q_OFFSETB). In  
typical operation, the I_OFFSET/Q_OFFSET pins would be  
controlled by a voltage derived from the baseband processor.  
However, it is also possible to minimise the DC offset using  
externalcomponents;thisisprimarilyintendedfortestpurposes.  
These feedback components between IOUT/QOUT and  
I_OFFSET/Q_OFFSET are shown in Fig. 4 but would not be  
used in the normal application  
FM MODE  
In FM mode the same filter is used; however, the biasing is  
designedsuchthatthecurrentdensityinthetransconductorcells  
is reduced by a factor of 46, changing the filter’s cutoff frequency  
to 15kHz. The filter characteristic of the main channel filter  
(gyrator filter) remains the same, i.e. a 0.1dB 7th order elliptic. In  
FM mode additional 2nd order Sallen and Key 0.1dB ripple  
Chebeyshevfilters(F2)areincludedinthesignalpathpriortothe  
gyrators. These improve the out-of-band blocking of the overall  
filter. Different amplifiers are used in FM mode to those used in  
CDMAmodetoenableoptimizationofthegaindistributioninFM  
mode for current consumption and dynamic range.  
In test mode, these offset controls are disabled and the offsets  
are controlled using on-chip feedback. The loop filter for this  
feedback uses external 10nF capacitors on pins I_OC_TEST/B  
and Q_OC_TEST/B as shown in Fig. 4.  
Pin  
Name  
I/O  
Description  
1
2
3
4
5
6
7
8
9
Q_OC_TEST  
Q_OC_TESTB  
QIN  
I
I
I
I
I
I
I
Q channel offset control in test mode  
Q channel offset control in test mode (balanced)  
Q channel CDMA/FM input.  
Q channel CDMA/FM input (balanced)  
Q channel offset control  
Q channel offset control (high gain mode)  
Test mode signal input for tuning operation  
Precision resistor for current definition (18k)  
I filter tuning control  
QINB  
Q_OFFSET  
Q_OFFSETB  
VTEST  
RTUNE  
ITUNE  
I
10 QTUNE  
11 QBAL  
12 QOUT  
13 QOUTB  
14 VCC  
I
I
Q filter tuning control  
Q channel gain adjust voltage, VGC  
Q channel CDMA/FM output  
Q channel CDMA/FM output (balanced)  
Supply  
Ground  
I channel CDMA (balanced)  
I channel CDMA  
O
O
P
P
O
O
15 VEE  
2
16 IOUTB  
17 IOUT  
18 VREF  
Reference voltage decouple  
Mode control (see Table 2)  
Mode control (see Table 2)  
Mode control (see Table 2)  
Ground (substrate)  
I channel offset control (high gain mode)  
I channel offset control  
I channel CDMA (balanced)  
I channel CDMA  
19 ENTEST  
20 ENABLE  
21 MODE_CDMA  
22 VEE  
23 I_OFFSETB  
24 I_OFFSET  
25 IINB  
I
I
I
P
I
I
I
I
26 IIN  
27 I_OC_TESTB  
28 I_OC_TEST  
I
I
I channel offset control in test mode (balanced)  
I channel offset control in test mode  
Table 1 Pin descriptions  
2
JUPITER  
Q_OC_TEST Q_OC_TESTB  
1
2
5
6
50k  
F3  
Q_OFFSET  
gm  
gm  
Q_OFFSETB  
V
GC  
11  
Q CHANNEL  
QBAL  
± 2dB  
F2  
-0·1  
dB  
gm  
3
4
12  
QIN  
QOUT  
X1  
gm  
ATTENUATOR  
13  
QINB  
QOUTB  
F1  
10  
19  
20  
21  
ENTEST  
ENABLE  
MODE_CDMA  
QTUNE  
RTUNE  
ITUNE  
8
MODE  
CONTROL  
FILTER  
CONTROL  
9
7
gm  
V
TEST  
26  
25  
17  
F1  
IIN  
IOUT  
gm  
ATTENUATOR  
X1  
16  
IINB  
IOUTB  
V
V
V
V
2
EE  
15  
22  
14  
18  
-0·1  
dB  
EE  
gm  
CC  
REF  
F2  
F3  
24  
23  
50k  
I_OFFSET  
gm  
gm  
I_OFFSETB  
28  
27  
I_OC_TEST  
I_OC_TESTB  
Fig. 3 Block diagram  
MODE_  
CDMA  
Description  
Sleep mode  
CDMA mode  
FM mode  
CDMA filter testmode  
FM filter test mode  
Disallowed mode  
ENABLE  
ENTEST  
Comments  
All circuits powered down  
0
1
1
1
1
0
X
1
0
1
0
X
1
0
0
1
1
0
Biasing and CDMA signal path on  
Biasing and FM signal path on  
Biasing, CDMA test and CDMA signal path on, excluding input amplifier  
Biasing, FM test and FM signal path on, excluding input amplifier.  
This is functionally the same as sleep mode but has higher ICC  
In sleep mode PLUTO applies a logic high to ENTEST  
.
Table 2 Truth table for mode control lines  
3
JUPITER  
ELECTRICAL CHARACTERISTICS  
The Electrical Characteristics are guaranteed over the following range of operating conditions unless otherwise  
stated (see Fig. 4 for test circuit):  
TAMB = 2 30°C to 170°C, VCC = 3V 10·6V/20·3V  
DC Characteristics  
Characteristic  
Value  
Units  
Conditions  
Typ.  
Min.  
Max.  
General  
Supply voltage, VCC  
2·7  
3·0  
3·6  
V
Operating temperature, TAMB  
230  
170  
°C  
Supply Current, ICC  
Sleep mode  
FM mode  
CDMA mode  
Turn off time, CDMA/FM  
mode to Sleep mode  
0·15  
5·2  
11·0  
mA  
mA  
mA  
µs  
QBAL = ITUNE = QTUNE <0·5V  
QBAL = ITUNE = QTUNE = 1·2V  
QBAL = ITUNE = QTUNE = 1·2V  
3·4  
7·3  
100  
ICC reduced to 10% of active value  
Mode Control Lines (CMOS)  
Input logic high, VIH  
Input logic low, VIL  
Input high current IIH  
Input low current, IIL  
2·0  
V
CC10·1  
0·5  
20  
20  
V
V
µA  
µA  
20·1  
220  
220  
All logic inputs  
%
Tune/Gain Control Lines  
DC level  
0·5  
2·0  
V
Input impedances:  
QBAL, ITUNE and QTUNE  
I_OFFSET/B and Q_OFFSET/B  
200  
500  
kΩ  
kΩ  
Referenced to on-chip ref. voltage (1·2V)  
I/O DC Voltages  
Inputs IIN/B and QIN/B  
Outputs IOUT/B and QOUT/B  
V
V
CC20·6  
CC21·6  
V
V
CC20·4  
CC21·4  
V
V
CC20·2  
CC21·2  
V
V
4
JUPITER  
ELECTRICAL CHARACTERISTICS  
FM Mode AC Characteristics  
All parameters are defined as differential unless otherwise stated  
Value  
Characteristic  
Units  
Conditions  
Typ.  
Min.  
Max.  
10  
MHz  
Maximum input frequency  
Gain Characteristics  
I voltage gain (AV) IIN/B to IOUT/B  
Q voltage gain QIN/B to QOUT/B  
Q channel gain adjust  
39  
AV21·5  
62  
41  
43  
AV11·5  
External load = 50kΩ//5pF  
QBAL = 1·2V  
QBAL = 0·5 to 2V  
dB  
dB  
4·0  
8·0  
10·75  
dB/V  
dB  
Q channel gain control  
Gain variation over temperature and  
supply voltage  
20·75  
VCC = 6150mV  
Differential output amplitude balance,  
QOUT/QOUTB, IOUT/IOUTB  
60·25  
dB  
Power Supply Rejection  
In-band  
Out of band  
10  
0
dB  
dB  
Measured at I/Q output frequency = 10kHz  
Measured at I/Q output frequency = 630kHz  
Noise  
Bandwidth = 10Hz to 5MHz. I and Q channels  
Frequency = 2kHz  
Input referred  
30  
45  
µVrms  
Vp-p  
1dB Compression  
Output 1dB compression  
1·5  
1·9  
Out of band blocking signal causing 1dB  
compression of in-band signal  
Blocking signal at 60kHz  
In-band frequency = 2kHz. All conditions  
mVrms 27°C only  
mVrms In-band frequency = 2kHz. All conditions  
mVrms 27°C only  
266  
266  
mVrms  
380  
380  
Blocking signal at 120kHz  
Intermodulation  
Unmodulated interferers  
Input referred intermodulation product  
2101  
dBV  
8·8  
µVrms 60kHz 75mVrms, 120kHz 7·5mVrms  
Filter Characteristic (Note 1)  
3dB pass band  
Stop band attenuation 45kHz  
Stop band attenuation 60kHz to 10MHz  
I and Q bandwidth matching  
In-band gain ripple  
14·5  
48  
60  
16·5  
63  
70  
19·5  
kHz  
dB  
dB  
%
dBp-p  
µs  
5
1·0  
ITUNE = QTUNE = 1·2V  
Group delay variation  
30  
Frequency = 100Hz to 12·2kHz  
%
Average phase balance, I and Q channels  
10  
deg  
Offset Loop Correction  
Filter offset adjustment gain:  
I_OFFSET/Q_OFFSET  
I_OFFSET B/Q_OFFSETB  
Amplifier offset settling time:  
After power on  
0·6  
8·0  
1·0  
10  
1·4  
V/V  
V/V  
4·0  
ms  
ms  
Settling to within 5mV  
Settling to within 5mV  
After CDMA to FM cycling  
4·0  
12  
Input Impedances  
QIN/QINB and IN/INB  
10  
kΩ  
kΩ  
Frequency = 2kHz  
Frequency = 2kHz  
Output Impedances  
QOUT/QOUTB and IOUT/IOUTB  
1·0  
NOTE 1. Filter tuned in CDMA mode to 28dB at 720kHz  
5
JUPITER  
ELECTRICAL CHARACTERISTICS  
CDMA Mode AC Characteristics  
All parameters are defined as differential unless otherwise stated  
Value  
Characteristic  
Units  
Conditions  
Typ.  
Min.  
Max.  
Maximum input frequency  
10  
MHz  
Gain Characteristics  
External load = 50kΩ//5pF  
QBAL = 1·2V  
QBAL = 0·5 to 2V  
I voltage gain (AV) IIN/B to IOUT/B  
Q voltage gain QIN/B to QOUT/B  
Q channel gain adjust  
43  
AV21·5  
62  
45  
47  
AV11·5  
dB  
dB  
Q channel gain control  
Gain variation over temperature and  
supply voltage  
4·0  
8·0  
10·75  
dB/V  
dB  
VCC = 6150mV  
20·75  
Differential output amplitude balance,  
QOUT/QOUTB, IOUT/IOUTB  
60·25  
dB  
Power Supply Rejection  
Measured at I/Q output frequency = 690kHz  
Bandwidth = 10Hz to 5MHz. I and Q channels  
Frequency = 2kHz  
20  
110  
1·9  
dB  
In-band  
Noise  
Input referred  
µVrms  
Vp-p  
1dB Compression  
Output 1dB compression  
1·5  
Out of band blocking signal causing 1dB  
compression of in-band signal  
Blocking signal at 60kHz  
In-band frequency = 100kHz. All conditions  
27°C only  
In-band frequency = 100kHz. All conditions  
27°C only  
110  
110  
mVrms  
mVrms  
mVrms  
mVrms  
150  
150  
Blocking signal at 120kHz  
Intermodulation  
Unmodulated interferers  
900kHz 24mVrms, 1700kHz 15mVrms  
27°C only  
Input referred intermodulation product  
284·8  
57  
dBV  
µVrms  
dBV  
2101  
8·8  
µVrms  
dBV  
Unmodulated interferers  
1·25MHz 24mVrms, 2·25MHz 15mVrms  
27°C only  
284·8  
Input referred intermodulation product  
57  
µVrms  
dBV  
2101  
8·8  
µVrms  
Filter Characteristic (Note 1)  
Tuning voltage to set filter to 28dB  
at 720kHz relative to 350kHz  
VCC = 6150mV  
0·5  
1·2  
0
2·0  
V
ITUNE/QTUNE voltage  
Pass band variation over supply and  
temperature variation  
23  
13  
%
240  
55  
kHz/V  
dB  
%
dBp-p  
deg  
I/Q tuning gain  
50  
Stop band attenuation 900kHz to 10MHz  
I and Q bandwidth matching  
In-band gain ripple  
ITUNE = QTUNE = 1·2V  
Frequency = 1kHz to 630kHz  
Frequency = 1kHz to 630kHz  
4
1·0  
3
Average phase balance, I and Q channels  
NOTE 1. Filter tuned to 28dB at 720kHz relative to 350kHz  
Cont…  
6
JUPITER  
ELECTRICAL CHARACTERISTICS  
CDMA Mode AC Characteristics (continued)  
Value  
Typ.  
Characteristic  
Units  
Conditions  
Min.  
Max.  
Offset Loop Correction  
Filter offset adjustment gain:  
I_OFFSET/Q_OFFSET  
I_OFFSET B/Q_OFFSETB  
Amplifier offset settling time:  
After power on  
1·2  
2·0  
2·0  
2·8  
V/V  
V/V  
Settling to within 6mV  
10  
4·0  
ms  
ms  
Settling to within 6mV  
Frequency = 2kHz  
Frequency = 2kHz  
After FM to CDMA cycling  
Input Impedances  
QIN/QINB and IN/INB  
8·0  
10  
12  
kΩ  
kΩ  
Output Impedances  
QOUT/QOUTB and IOUT/IOUTB  
1·0  
V
QBAL  
V
TEST  
EN_TEST ENABLE MODE_CDMA  
CC  
QTUNE  
ITUNE  
QIN  
IIN  
QIN  
IIN  
QINB  
IINB  
I_OFFSET  
I_OFFSETB  
I_OC_TEST  
I_OC_TESTB  
IOUT  
Q_OFFSET  
10n  
100n  
100n  
10n  
Q_OFFSETB  
Q_OC_TEST  
Q_OC_TESTB  
QOUT  
V
JUPITER  
V
CC  
CC  
100k  
100k  
100k  
100k  
10n  
10n  
QOUT  
IOUT  
QOUTB  
RTUNE  
IOUTB  
V
REF  
V
V
2
EE  
EE  
V
CC  
220n  
18k  
1n  
100n  
Fig. 4 Test circuit  
7
http://www.mitelsemi.com  
World Headquarters - Canada  
Tel: +1 (613) 592 2122  
Fax: +1 (613) 592 6909  
North America  
Tel: +1 (770) 486 0194  
Fax: +1 (770) 631 8213  
Asia/Pacific  
Tel: +65 333 6193  
Fax: +65 333 6192  
Europe, Middle East,  
and Africa (EMEA)  
Tel: +44 (0) 1793 518528  
Fax: +44 (0) 1793 518581  
Information relating to products and services furnished herein by Mitel Corporation or its subsidiaries (collectively “Mitel”) is believed to be reliable. However, Mitel assumes no  
liability for errors that may appear in this publication, or for liability otherwise arising from the application or use of any such information, product or service or for any infringement of  
patents or other intellectual property rights owned by third parties which may result from such application or use. Neither the supply of such information or purchase of product or  
service conveys any license, either express or implied, under patents or other intellectual property rights owned by Mitel or licensed from third parties by Mitel, whatsoever.  
Purchasers of products are also hereby notified that the use of product in certain ways or in combination with Mitel, or non-Mitel furnished goods or services may infringe patents or  
other intellectual property rights owned by Mitel.  
This publication is issued to provide information only and (unless agreed by Mitel in writing) may not be used, applied or reproduced for any purpose nor form part of any order or  
contract nor to be regarded as a representation relating to the products or services concerned. The products, their specifications, services and other information appearing in this  
publication are subject to change by Mitel without notice. No warranty or guarantee express or implied is made regarding the capability, performance or suitability of any product or  
service. Information concerning possible methods of use is provided as a guide only and does not constitute any guarantee that such methods of use will be satisfactory in a specific  
piece of equipment. It is the user’s responsibility to fully determine the performance and suitability of any equipment using such information and to ensure that any publication or  
data used is up to date and has not been superseded. Manufacturing does not necessarily include testing of all functions or parameters. These products are not suitable for use in  
any medical products whose failure to perform may result in significant injury or death to the user. All products and materials are sold and services provided subject to Mitel’s  
conditions of sale which are available on request.  
M Mitel (design) and ST-BUS are registered trademarks of MITEL Corporation  
Mitel Semiconductor is an ISO 9001 Registered Company  
Copyright 1999 MITEL Corporation  
All Rights Reserved  
Printed in CANADA  
TECHNICAL DOCUMENTATION - NOT FOR RESALE  
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