Serial-parallel type analogue/digital converter

Details Serial-parallel type analogue/digital converter Serial-parallel type analogue/digital converter

1991-05-21

1992-10-27

Hoff, Marc

Coded data generation or conversion

Analog to or from digital conversion

Analog to digital conversion

341156, H03M 142

Patent

active

051593424

ABSTRACT:
A serial-parallel type A/D converter comprises first and second circuit blocks which are connected serially to operate in pipe lining. An input analogue signal is converted to a digital signal having highest significant bits at the first circuit block, and an analogue signal obtained by subtracting an analogue signal equal in value to the digital signal from the input analogue signal is converted at the second circuit block. The second circuit block is a recursive circuit block in which A/D converting operation is carried out for a plurality of cycles at the timing of several times faster than that of the first circuit block.

REFERENCES:
patent: 4144525 (1979-03-01), O'Neill
patent: 4410876 (1983-10-01), Sawagata
patent: 4559523 (1985-12-01), Wakita
patent: 4763107 (1988-08-01), Koen et al.
patent: 4875048 (1989-10-01), Shimizu et al.
patent: 4973974 (1990-11-01), Suzuki
"A 12-bit Low Power Consumption CMOS Recursive Subranging A/D Conversion IC"; Microelectronics Research Labs; NEC Corp., 1989.
"A High-Speed High-gain CMOS Operational Amplifier"; Microelectronics Research Labs; NEC Corp., 1989.

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