Title :
A 10-b 50 MS/s 500-mW A/D converter using a differential-voltage subconverter
Author :
Miki, Takahiro ; Kouno, Hiroyuki ; Kumamoto, Toshio ; Kinoshita, Yasushi ; Igarashi, Takayuki ; Okada, Keisuke
Author_Institution :
Syst. LSI Lab., Mitsubishi Electr. Corp., Hyogo, Japan
fDate :
4/1/1994 12:00:00 AM
Abstract :
A BiCMOS A/D converter using a “differential voltage subconverter,” which directly converts a voltage difference of complementary analog inputs to a digital code, is described. Fully differential architecture has advantages in immunity of common-mode error and in reduction of supply voltage. This differential-voltage subconverter realizes the fully differential A/D conversion without using interpolation technique. This subconverter is free from CR delay caused in the ladder resistors. Circuit techniques for high-accuracy conversion with single 5-V power supply, such as compensation technique for VBE modulation in emitter degeneration amplifier, are also described. A 10-b A/D converter is fabricated in a 0.8-μm BiCMOS process with fT of 9 GHz. It successfully operates at 50 MS/s with 500-mW power consumption and with 5-V single supply
Keywords :
BiCMOS integrated circuits; analogue-digital conversion; comparators (circuits); compensation; linear integrated circuits; 0.8 micron; 5 V; 500 mW; A/D converter; BiCMOS; VBE modulation; common-mode error; compensation technique; complementary analog inputs; differential-voltage subconverter; emitter degeneration amplifier; fully differential A/D conversion; high-accuracy conversion; supply voltage; voltage difference; Analog-digital conversion; BiCMOS integrated circuits; Chromium; Delay; Energy consumption; High power amplifiers; Interpolation; Power supplies; Resistors; Voltage;
Journal_Title :
Solid-State Circuits, IEEE Journal of
