Analog-to-digital converter

Details Analog-to-digital converter Analog-to-digital converter

1993-09-30

1995-11-07

Williams, Howard L.

Coded data generation or conversion

Sample and hold

341118, 341155, 327 94, H03M 106

Patent

active

054650933

ABSTRACT:
The present invention discloses an improved analog-to-digital converter. A second sampling circuit samples the voltage difference between an analog signal and a reference voltage, before a first sampling circuit moves to a follow operation from a sample operation. Owing to pipelining by the first and second sampling circuits, even after the first sampling circuit moves to a follow operation, the difference between an analog signal and a reference voltage is still applied to a logical-level amplifier. The output of the logical-level amplifier, amplified to a logical voltage, is converted by a logic device into an A/D conversion output. Therefore, ADC differential non linearity error can be reduced.

REFERENCES:
patent: 4523107 (1985-06-01), Peterson
patent: 4611196 (1986-09-01), Fernandez
patent: 4672239 (1987-06-01), Thommen
patent: 5113090 (1992-05-01), Imaizumi et al.
patent: 5381053 (1995-01-01), Yasuda

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