Title :
A rail-to-rail ping-pong op-amp
Author :
Opris, Ion E. ; Kovacs, Gregory T A
Author_Institution :
Center for Integrated Syst., Stanford Univ., CA, USA
fDate :
9/1/1996 12:00:00 AM
Abstract :
A rail-to-rail ping-pong op-amp achieves offset cancellation and 1/f noise reduction without folding of the input spectrum. The clocking scheme minimizes the clock feedthrough and the residual offset due to charge injection. With a clock frequency of 100 kHz, the residual offset is less than 100 μV, and the input referred noise is about 225 nV/Hz 1/2. The rail-to-rail distortion at 1 kHz is lower than -71 dB. The total silicon area is 610×420 μm2, and the circuit dissipates 1.5 mW from a single 5 V supply
Keywords :
1/f noise; CMOS analogue integrated circuits; differential amplifiers; integrated circuit noise; operational amplifiers; timing; 1.5 W; 1/f noise reduction; 100 kHz; 5 V; CMOS op amp; Si; clock feedthrough minimisation; clocking scheme; offset cancellation; ping-pong op-amp; rail-to-rail opamp; Capacitors; Circuits; Clocks; Frequency; MOS devices; Noise reduction; Nonlinear distortion; Operational amplifiers; Switches; Transconductance;
Journal_Title :
Solid-State Circuits, IEEE Journal of
