Title :
A 200-MHz 15-mW BiCMOS sample-and-hold amplifier with 3 V supply
Author_Institution :
AT&T Bell Labs., Holmdel, NJ, USA
fDate :
12/1/1995 12:00:00 AM
Abstract :
A sample-and-hold amplifier designed for the front end of high-speed low-power analog-to-digital converters employs a BiCMOS sampling switch and a low-voltage amplifier to achieve a sampling rate of 200 MHz while allowing input/output voltage swings of 1.5 V with a 3-V supply. The circuit also incorporates a cancellation technique to relax the trade-off between the hold-mode feedthrough and the sampling speed. Fabricated in a 20-GHz 1-μm BiCMOS technology, an experimental prototype exhibits a harmonic distortion of -65 dB with a 10-MHz analog input and occupies an area of 220×150 μm2. The measured feedthrough is -52 dB for a 50-MHz analog input and the droop rate is 40 μV/ns
Keywords :
BiCMOS analogue integrated circuits; amplifiers; analogue-digital conversion; sample and hold circuits; switching circuits; 1 micron; 15 mW; 20 GHz; 200 MHz; 3 V; BiCMOS sample/hold amplifier; BiCMOS sampling switch; S/H amplifier; analog-to-digital converters; cancellation technique; harmonic distortion; high-speed low-power ADC front-end; hold-mode feedthrough; low-voltage amplifier; sampling speed; Analog-digital conversion; BiCMOS integrated circuits; Distortion measurement; Harmonic distortion; Linearity; Operational amplifiers; Power dissipation; Sampling methods; Switches; Voltage;
Journal_Title :
Solid-State Circuits, IEEE Journal of
