Method and apparatus for digital to analog conversion

Details Method and apparatus for digital to analog conversion Method and apparatus for digital to analog conversion

1997-03-20

1998-09-29

Young, Brian K.

Coded data generation or conversion

Analog to or from digital conversion

Digital to analog conversion

H03M 166

Patent

active

058151044

ABSTRACT:
A method and apparatus for converting a digital signal into an analog signal with minimal self generated noise is achieved by a digital to analog converter that includes a current source, a switch circuit, and a gating circuit. The current source provides a current, which is representative of digital data, to the switch circuit. The switch circuit, based on control signals provided by the gating circuit, routes the current to an analog node and/or a reference potential node. The control signals cause the switch circuit to route the current to both nodes when a clock pulse signal is in a first state regardless of the state of the data, to route the current to the analog node when the clock pulse signal is in a second state and digital data is in a second state, and to route the current to the reference potential node when the clock pulse signal is in the second state and the digital data is in a first state. In this manner, an analog representation of the digital data is present at the analog node.

REFERENCES:
patent: 5592165 (1997-01-01), Jackson et al.
patent: 5602552 (1997-02-01), Hirose et al.

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