Digital-to-analog converting field effect device and circuitry

Details Digital-to-analog converting field effect device and circuitry Digital-to-analog converting field effect device and circuitry

1989-05-01

1991-04-02

Hille, Rolf

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

357 2314, 3072961, H01L 2980, H01L 2978, H03K 301

Patent

active

050050591

ABSTRACT:
A field effect device and circuit suitable for providing an analog output signal having a magnitude which is representative of a digital input code having a sequence of bits. The device includes a plurality of gate electrodes located between an input electrode and an output electrode. The gate electrodes have unequal lengths to provide different gate widths each representative of the magnitude of a portion of an analog signal provided at the output electrode in response to a digital signal of a particular logic state, such as a logical "one", when applied to any one of the gate electrodes. Thus, the magnitude of the current conducted between the input electrode and the output electrode is responsive to the sum of the widths of the gates receiving the digital signal of a particular logic state.

REFERENCES:
patent: 3969745 (1976-07-01), Blocker, III
patent: 4684965 (1987-08-01), Tajima et al.
patent: 4734751 (1988-03-01), Hwang et al.
patent: 4864162 (1989-09-01), Maoz

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