Title :
High-accuracy charge-redistribution SC video bandpass filter in standard CMOS
Author :
Quinn, Patrick J.
Author_Institution :
Syst. Lab., Philips Semicond., Eindhoven, Netherlands
fDate :
7/1/1998 12:00:00 AM
Abstract :
A differential switched-capacitor recursive bandpass filter is presented based on a charge-redistribution technique. The center frequency is 4.286 MHz with a quality factor of 16, and the sampling frequency is 25.7 MHz. It is specifically intended for the high-frequency deemphasis of SECAM TV video signals. The active capacitors are realized using only a sandwich construction of poly-metal1-metal2. A dual-input single-stage telescopic OTA is proposed, which has a very high current efficiency. The filter behavior is very linear, and achieves a dynamic range of 79 dB for 1% third-order intermodulation. The power consumption is only 4 mW for a 5-V supply voltage, and is realized in 0.75 mm2 in a standard 0.8-μm double-metal digital CMOS process
Keywords :
CMOS analogue integrated circuits; Q-factor; band-pass filters; operational amplifiers; recursive filters; switched capacitor filters; video signal processing; 0.8 micron; 25.7 MHz; 4 mW; 4.286 MHz; 5 V; SC video bandpass filter; SECAM TV video signal; center frequency; charge redistribution; current efficiency; differential switched-capacitor recursive filter; double-metal digital CMOS process; dual-input single-stage telescopic OTA; dynamic range; high-frequency deemphasis; linearity; poly-metal-metal sandwich; quality factor; sampling frequency; third-order intermodulation; Band pass filters; Capacitors; Dynamic range; Energy consumption; Frequency; Nonlinear filters; Q factor; Sampling methods; TV; Voltage;
Journal_Title :
Solid-State Circuits, IEEE Journal of
