Title :
A low noise integrated AMPS IF filter
Author :
Adachi, Toshio ; Ishikawa, Akira ; Tomioka, Koji ; Hara, Susumu ; Takasuka, Kaoru ; Hisajima, Hiroshi ; Barlow, Allen
Author_Institution :
Asahi Kasei Microsystems, Tokyo, Japan
Abstract :
A 455 KHz IF filter suitable for AMPS cellular telephone applications has been developed in a 1.2 μm CMOS technology. The design is based on interspersion of repeated AGC and leapfrog gm -C stages. Including RSSI circuitry, the active area is 17 mm2. It draws 6.5 mA from a single ended 5 V supply. Measured results confirm a dynamic range of 64 dB and an S/(N+D) of 40 dB, sufficient for AMPS cellular applications
Keywords :
CMOS analogue integrated circuits; active filters; automatic gain control; cellular radio; land mobile radio; radiofrequency filters; 1.2 micron; 455 kHz; 5 V; 6.5 mA; CMOS technology; RSSI circuitry; active area; cellular telephone applications; dynamic range; integrated AMPS IF filter; leapfrog gm-C stages; received signal strength indicator; repeated AGC; Band pass filters; Baseband; CMOS technology; Chebyshev approximation; Circuit noise; Noise reduction; RF signals; Radio frequency; Signal processing; Telephony;
Conference_Titel :
Custom Integrated Circuits Conference, 1994., Proceedings of the IEEE 1994
Conference_Location :
San Diego, CA
Print_ISBN :
0-7803-1886-2
DOI :
10.1109/CICC.1994.379746
