FET logic gate circuits

Details FET logic gate circuits FET logic gate circuits

1973-07-05

1977-05-24

Miller, Charles D.

Communications: electrical

Audible indication

Percussion-type sound producer

307205, 307251, H03K 1324

Patent

active

RE0292346

ABSTRACT:
A gate circuit includes field effect transistors interconnected to provide an output signal of a first type whenever all input signals are of predetermined types, and to provide an output of a second type whenever any input signal is other than one of the predetermined types, wherein the only current required by the circuit is that supplied by the output of the circuit to a load which is driven by the circuit. Preferably, the circuit includes a plurality of logic-steering field effect transistors connected with their controlled electrodes in series such that an input signal is connected to an output load device, such as a capacitor, only if all of the logic-steering transistors have been turned ON. A ground return transistor is provided for each logic-steering transistor and operates to provide a ground at the output of the logic-steering transistor if an improper input signal is received. Binary data signals, or inversions thereof, are connected to the gates of the transistors in desired patterns to operate the load device only on a proper combination of input signals.

REFERENCES:
patent: 3355598 (1967-11-01), Tuska
patent: 3356858 (1967-12-01), Wanlass
patent: 3500062 (1970-03-01), Annis
patent: 3502908 (1970-03-01), Christensen
patent: 3502909 (1970-03-01), Christensen et al.
patent: 3541353 (1970-11-01), Seelbach et al.

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