D/A converter with means to prevent output signal instability

Details D/A converter with means to prevent output signal instability D/A converter with means to prevent output signal instability

1992-12-28

1994-06-07

Young, Brian K.

Coded data generation or conversion

Analog to or from digital conversion

Digital to analog conversion

H03M 166

Patent

active

053193717

ABSTRACT:
A D/A converter of the type provided with an amplifier to produce the analog output signal and formed as an IC chip. The chip includes a power voltage monitor to sense when the applied DC voltage is above a preset lower level and below a preset upper level. When that condition is sensed, the monitor activates a control circuit which in turn opens a transmission gate between the amplifier output circuit and the converter output terminal, and closes a transmission gate between the output terminal and ground. When the DC voltage goes above the preset upper level, and a valid digital word is loaded into the converter register and presented for conversion, the condition of the transmission gates is reversed to provide for normal operation of the converter.

REFERENCES:
patent: 4276593 (1981-06-01), Hansen
patent: 4945301 (1990-07-01), Koga et al.

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