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A 12-bit, 1-MHz, two-step flash ADC

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3 Author(s)
Kerth, D.A. ; Crystal Semicond. Corp., Austin, TX, USA ; Sooch, N.S. ; Swanson, E.J.

A monolithic 12-b 1 MHz, two-step flash analog-to-digital converter (ADC) has been implemented in standard 3- mu m CMOS technology. A 12-b accurate reference bank incorporating a switched-capacitor integrator and a bank of 66 sample-and-hold amplifiers is discussed. Self-calibration techniques are used to correct for the converter offset, gain, and nonlinearity errors. The converter differential nonlinearity errors below 1/2 LSB and the S/(N+D) signal to noise is 70 dB for 100-kHz analog input.<>

Published in:

Solid-State Circuits, IEEE Journal of  (Volume:24 ,  Issue: 2 )

Date of Publication:

April 1989

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