论文信息 - A Low Power CMOS gm-C Polyphase Filter for Low-IF GPS Receiver

A Low Power CMOS gm-C Polyphase Filter for Low-IF GPS Receiver

In this paper a 0.35 micro meter CMOS gm-C polyphase filter for low-IF GPS receiver is presented. This gm-C filter is a combination of two 3rd order channel-select Chebyshev low pass and one 5th order polyphase Elliptic filters. The overall filter has a pass band of 2.9 to 5.3 MHz, 30 dB pass band gain with less than 1 dB in-band ripple, more than 60 dB attenuation at 2.5 MHz offset from the center frequency, more than 18 dB image rejection and drains 1.95 mA from a 2.2V supply. An inverter-based low noise and high frequency transconductor is designed for the filter. Also, a new technique to reduce the number of coupling transconductance cells in a polyphase filter, while using the same gm unit across the filter, is introduced. A quadrature offset removal circuit is employed to remove the offset of this 30 dB gain filter.

Siamak Delshadpour

[1] Asad A. Abidi,et al. CMOS mixers and polyphase filters for large image rejection , 2001, IEEE J. Solid State Circuits.

[2] Bram Nauta,et al. A CMOS transconductance-C filter technique for very high frequencies , 1992 .

[3] Hirad Samavati,et al. A 115-mW, 0.5-μm CMOS GPS receiver with wide dynamic-range active filters , 1998, IEEE J. Solid State Circuits.

[4] Dai Yujie,et al. Design and Implementation of Complex Filter for GPS Receiver , 2015 .

[5] Zhihua Wang,et al. An Active-RC Complex Filter with Mixed Signal Tuning System for Low-IF Receiver , 2006, APCCAS 2006 - 2006 IEEE Asia Pacific Conference on Circuits and Systems.

[6] Yannis Tsividis,et al. Integrated continuous-time filter design - an overview , 1994, IEEE J. Solid State Circuits.

[7] Mohammad Nariman,et al. A fully integrated low-IF CMOS GPS radio with on-chip analog image rejection , 2002, IEEE J. Solid State Circuits.