Title :
A 3 V 10 MHz pseudo-differential SC bandpass filter using gain enhancement replica amplifier
Author :
Nagari, Angelo ; Nicollini, Germano
Author_Institution :
SGS-Thomson Microelectron., Agrate Brianza, Italy
fDate :
4/1/1998 12:00:00 AM
Abstract :
This paper describes the design strategy and implementation of a high frequency low voltage pseudo-differential SC filter which use opamps with gain enhancement replica amplifier. Experimental results of a biquad SC bandpass with a center frequency of 10 MHz and a Q of 10 are presented. The realized opamp has an open-loop unity-gain bandwidth of 850 MHz, a phase margin of about 62°, and a dc gain of 50 dB. The prototype filter dissipates 23 mW from a 3 V supply and occupies 0.3 mm 2 in a 0.8 μm N-well single-poly, double-metal CMOS process
Keywords :
CMOS analogue integrated circuits; Q-factor; band-pass filters; biquadratic filters; operational amplifiers; switched capacitor filters; 0.8 micron; 10 MHz; 23 mW; 3 V; 50 dB; 850 MHz; DC gain; N-well single-poly double-metal CMOS process; Q factor; biquad bandpass filter; gain enhancement replica amplifier; high frequency low voltage pseudo-differential SC filter; opamp; open-loop unity-gain bandwidth; phase margin; Band pass filters; Bandwidth; CMOS process; Circuits; Clocks; Frequency; Gain; Low voltage; Prototypes; Sampling methods;
Journal_Title :
Solid-State Circuits, IEEE Journal of
