Semiconductor device for driving thermal print heads

Electric heating – Heating devices – Combined with diverse-type art device

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400120, 400279, 346 76PH, H05B 300, G01D 1510, B41J 320

Patent

active

044477040

ABSTRACT:
A semiconductor device is used, for example, for controlling and driving thermal heads of a facsimile apparatus and includes a first circuit activated when power is supplied to the semiconductor device and a second circuit activated only when both power and a power control signal are applied to the semiconductor device. The semiconductor device further includes a power switch circuit which includes a semiconductor electronic circuit and which supplies power to the second circuit only when the power control signal is applied thereto.

REFERENCES:
patent: 3501615 (1970-03-01), Merryman
patent: 3777116 (1973-12-01), Brescia
patent: 4070587 (1978-01-01), Hanakata
patent: 4366489 (1982-12-01), Yamaguchi
patent: 4376942 (1983-03-01), Toth

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