Digital-to-analog converter

Details Digital-to-analog converter Digital-to-analog converter

1993-02-17

1995-01-03

Williams, Howard L.

Coded data generation or conversion

Analog to or from digital conversion

Differential encoder and/or decoder

341136, 341144, H03M 300

Patent

active

053790405

ABSTRACT:
A digital-to-analog converter includes a decoder, a full differential type low-pass filter, and first to fourth switches. The decoder has first and second inputs and first and second outputs. The low-pass filter has first and second inputs and first and second outputs. The first switch has a first terminal connected to a first reference voltage source, a second terminal connected to the first input of the low-pass filter, and a third terminal as a control terminal connected to the first output of the decoder. The second switch has a first terminal connected to the first reference voltage source, a second terminal connected to the second input of the low-pass filter, and a third terminal as a control terminal connected to the second output of the decoder. The third switch has a first terminal connected to a second reference voltage source, a second terminal connected to the second input of the low-pass filter, and a third terminal as a control terminal connected to the first output of the decoder. The fourth switch has a first terminal connected to the second reference voltage source, a second terminal connected to the first input of the low-pass filter, and a third terminal connected to the second output of the decoder.

REFERENCES:
patent: 4622536 (1986-11-01), Shih et al.
patent: 4633425 (1986-12-01), Senderowicz
patent: 4896156 (1990-01-01), Garverick
patent: 5072219 (1991-12-01), Boutaud et al.
patent: 5287107 (1994-02-01), Gampell et al.
Nikkei Electronics, Aug. 1988, No. 453, p. 220.
Technical Report, The Institute of Electronics, Information and Communication Engineers, ICD91-88, Aug. 1988.
A 16b Oversampling CODEC with Filtering DSP, by Toshiyuki Okamoto et al., 1991 IEEE International Solid-State Circuits Conference.

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