A 10-b, 1-GSample/s track-and-hold amplifier using SiGe BiCMOS technology

Author

Razzaghi, Alireza ; Chang, M. C Frank

Author_Institution

Dept. of Electr. Eng., California Univ., Los Angeles, CA, USA

fYear

2003

fDate

21-24 Sept. 2003

Firstpage

433

Lastpage

436

Abstract

An open-loop pseudo differential BiCMOS track-and-hold amplifier (THA) employs a new adaptive-biased input buffer to maintain performance at high input frequencies. An auxiliary THA undergoes all linearity-degrading loading impacts to generate compensating signals. These signals are exploited to improve the hold-mode suppression in the main THA. Designed total harmonic distortion (THD) is -63.7 dB at Nyquist condition, f_in=500 MHz, with full-scale differential input swing of 1 V. Fabricated in a 0.5 μm, 40 GHz BiCMOS process, the THA core consumes 164 mW from a 3.5 V power supply and occupies an active area of 1 mm². The hold-mode feed through measures -54 dB at f_in=93.75 MHz and the droop rate is -0.33 μV/nS.

Keywords

BiCMOS analogue integrated circuits; UHF amplifiers; harmonic distortion; sample and hold circuits; 0.5 micron; 1 V; 164 mW; 3.5 V; 40 GHz; 500 MHz; 93.75 MHz; BiCMOS technology; SiGe; THD; adaptive-biased input buffer; droop rate; full-scale differential input swing; hold-mode feed through; hold-mode suppression; linearity-degrading loading impact compensation; open-loop pseudo differential THA; total harmonic distortion; track-and-hold amplifier; Bandwidth; BiCMOS integrated circuits; Differential amplifiers; Frequency; Germanium silicon alloys; Radar tracking; Sampling methods; Silicon germanium; Switches; Uncertainty;

fLanguage

English

Publisher

ieee

Conference_Titel

Custom Integrated Circuits Conference, 2003. Proceedings of the IEEE 2003

Print_ISBN

0-7803-7842-3

Type

conf

DOI

10.1109/CICC.2003.1249435

Filename

1249435