Title:
CAPACITIVE FOLDING CIRCUIT FOR USE IN A FOLDING/INTERPOLATING ANALOG-TO-DIGITAL CONVERTER
Document Type and Number:
WIPO Patent Application WO2002065643
Kind Code:
A3
Abstract:
An M-bit folding/interpolating analog-to-digital converter (ADC) circuit, comprising a reference voltage generator, a converter, an interpolator, an amplifying stage, a comparator, and an encoder. The converter has an amplifier that receives at least one of a plurality of first reference voltage signals and outputs a plurality of coarse bits. The converter also has N-number of folding blocks, which output a plurality of folded signals. Each folding block comprises a plurality of capacitors, a differential amplifier and a feedback element. The folded signals output by the converter are then interpolated, amplified, compared and output as a plurality of fine bits. The encoder receives the coarse and fine bits and outputs the digital signal.
Inventors:
BULT KLAAS
Application Number:
PCT/US2002/003878
Publication Date:
December 11, 2003
Filing Date:
February 11, 2002
Export Citation:
Assignee:
BROADCOM CORP (US)
International Classes:
H03M1/20; H03M1/36; (IPC1-7): H03M1/36
Other References:
NAUTA B ET AL: "FA 16.3: A 70MSAMPLE/S 110MW 8B CMOS FOLDING INTERPOLATING A/D CONVERTER", IEEE INTERNATIONAL SOLID STATE CIRCUITS CONFERENCE, IEEE INC. NEW YORK, US, vol. 38, 1 February 1995 (1995-02-01), pages 276 - 277,379, XP000557639, ISSN: 0193-6530
VAN DE GRIFT: "AN 8-BIT VIDEO ADC INCORPORATING FOLDING AND INTERPOLATION TECHNIQUES", IEEE JOURNAL OF SOLID-STATE CIRCUITS, IEEE INC. NEW YORK, US, vol. 22, no. 6, 1 December 1987 (1987-12-01), pages 944 - 953, XP000560513, ISSN: 0018-9200
NAUTA B ET AL: "A 70-MS/S 110-MW 8-B CMOS FOLDING AND INTERPOLATING A/D CONVERTER", IEEE JOURNAL OF SOLID-STATE CIRCUITS, IEEE INC. NEW YORK, US, vol. 30, no. 12, 1 December 1995 (1995-12-01), pages 1302 - 1308, XP000557233, ISSN: 0018-9200
VAN VALBURG J ET AL: "AN 8-B 650-MHZ FOLDING ADC", IEEE JOURNAL OF SOLID-STATE CIRCUITS, IEEE INC. NEW YORK, US, vol. 27, no. 12, 1 December 1992 (1992-12-01), pages 1662 - 1666, XP000329014, ISSN: 0018-9200
VAN DE GRIFT: "AN 8-BIT VIDEO ADC INCORPORATING FOLDING AND INTERPOLATION TECHNIQUES", IEEE JOURNAL OF SOLID-STATE CIRCUITS, IEEE INC. NEW YORK, US, vol. 22, no. 6, 1 December 1987 (1987-12-01), pages 944 - 953, XP000560513, ISSN: 0018-9200
NAUTA B ET AL: "A 70-MS/S 110-MW 8-B CMOS FOLDING AND INTERPOLATING A/D CONVERTER", IEEE JOURNAL OF SOLID-STATE CIRCUITS, IEEE INC. NEW YORK, US, vol. 30, no. 12, 1 December 1995 (1995-12-01), pages 1302 - 1308, XP000557233, ISSN: 0018-9200
VAN VALBURG J ET AL: "AN 8-B 650-MHZ FOLDING ADC", IEEE JOURNAL OF SOLID-STATE CIRCUITS, IEEE INC. NEW YORK, US, vol. 27, no. 12, 1 December 1992 (1992-12-01), pages 1662 - 1666, XP000329014, ISSN: 0018-9200
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