Automatic voltage reference scaling in analog-to-digital and dig

Details Automatic voltage reference scaling in analog-to-digital and dig Automatic voltage reference scaling in analog-to-digital and dig

1996-07-15

2000-07-18

Young, Brian K.

Coded data generation or conversion

Analog to or from digital conversion

Nonlinear

341155, 341144, H03M 100

Patent

active

060913509

ABSTRACT:
Analog-to-digital and digital-to-analog converters are described which have internal reference voltage generators. These voltage generators include circuitry which senses the magnitude of the power supply voltage applied to the chip. The internal reference voltage generators then select one of two internal reference voltages as a reference voltage for the conversion operations depending on the magnitude of the power supply voltage.

REFERENCES:
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patent: 4908623 (1990-03-01), Ullestad
Brokaw, A.P., "A Monolithic 10-Bit A/D Using I.sup.2 L and LWT Thin-Film Resistors," IEEE J. Solid-State Circuits, vol. SC-13, pp. 736-745, Dec. 1978.
Kelson, G., et al., "A Monolithic 10-b Digital-to-Analog Converter Using Ion Implantation," IEEE J. Solid-State Circuits, vol. SC-8, pp. 396-403, Dec. 1973.
Hamade, A.R., "A Single Chip All-MOS 8-Bit A/D Converter," IEEE J. Solid-State Circuits, vol. SC-8, pp. 396-403, Dec. 1973.
lnose, H., et al, "A Telemetry System by Code Modulation--Delta-Sigma Modulation," IRE Trans. Space Electron. Telemetry, vol. SET-8, pp. 204-209, Sep. 1962.
Naus, P.J.A., et al., "A CMOS Stereo 16-Bit D/A Converter for Digital Audio," IEEE J. Solid-State Circuits, vol. SC-22, pp. 390-395, Jun. 1987.

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