Low-current digital-to-analog converter

Details Low-current digital-to-analog converter Low-current digital-to-analog converter

1993-04-02

1994-11-01

Hoff, Marc S.

Coded data generation or conversion

Analog to or from digital conversion

Digital to analog conversion

341118, H03M 166

Patent

active

053610687

ABSTRACT:
A current-multiplying digital-to-analog converter (DAC) produces a low-current output which has significantly reduced current spikes or "glitches" resulting from the inherent capacitances of the switching transistors. A transistor connected in what would normally be the output line of the DAC establishes a voltage which varies in proportion to the current in that line. This voltage is applied to the control terminal of a transistor in a second current line to regulate an output current which can be made very low without experiencing significant glitches. A DAC having differential outputs (actual and complementary values) is described.

REFERENCES:
patent: 4132908 (1979-01-01), Hughes
patent: 4178584 (1979-12-01), Davis
patent: 4712091 (1987-12-01), Shoofs et al.
patent: 5034744 (1991-07-01), Obinata
patent: 5105193 (1992-04-01), Vogt et al.
patent: 5227793 (1993-07-01), Aisu
patent: 5231396 (1993-07-01), Yagi
"DAC0800/DAC0801/DAC0802, 8-Bit Digital-to-Analog Converters", National Semiconductor Data Book 2, Rev. 1, 1988 Edition, pp. 4-6 to 4-10, 4-15, 4-19, 4-89 and 4-93.

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