Analog-to-digital converter

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

1994-09-26

1996-10-01

Gaffin, Jeffrey A.

Coded data generation or conversion

Analog to or from digital conversion

Analog to digital conversion

341118, 341172, H03M 112, H03M 106

Patent

active

055614264

ABSTRACT:
A converter for converting an analog signal into a digital representation having a most significant bit (MSB), upper-significant bits (USBs), and lower-significant bits (LSBs) with a least significant bit being a predetermined incremental voltage value. The converter is responsive to external signals and is adapted to receive a supply voltage. The analog-to-digital converter provides for a determination of the most significant bit (MSB) that does not rely on the ratio factor between the capacitors of the charge-storage capacitor bank nor on the accuracy of the ratio factor of the resistors of the voltage-scale resistive ladder network. Further, the converter comprises a charge-storage capacitor bank, a voltage-scale resistive ladder network, first and second comparators, an output stage amplifier, and an arrangement of electronically controlled switches and capacitors that cancel the DC offset conditions within the analog-to-digital converter in such a way that the DC offset conditions do not jeopardize the accuracy of the converter.

REFERENCES:
patent: 4194187 (1980-03-01), Glendinning
patent: 4200863 (1980-04-01), Hodges et al.
patent: 4366439 (1982-12-01), Yamakido
patent: 4388612 (1983-06-01), Takagi et al.
patent: 4907002 (1990-03-01), Kawada
patent: 4918449 (1990-04-01), Chin
patent: 5016014 (1991-05-01), Bitting
patent: 5148170 (1992-09-01), Leopold et al.
patent: 5416485 (1995-05-01), Lee

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