Semiconductor circuit

Communications: electrical – Audible indication – Percussion-type sound producer

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Details

H03M 178

Patent

active

047588209

ABSTRACT:
A semiconductor circuit is provided with a constant current circuit, a resistor network to which a current from the constant current circuit is supplied, and a device between the constant current circuit and the resistor network for switching the current supplied from the constant current circuit to the resistor network.

REFERENCES:
patent: 3258765 (1966-06-01), Battjes
patent: 4458201 (1984-07-01), Koen

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