IC for implementing the function of a DIAC diode

Electric lamp and discharge devices: systems – Periodic switch in the supply circuit – Plural periodic switches or multiple contact periodic switch

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Details

315291, 315307, 315DIG7, 327103, 327108, H05B 3702

Patent

active

059864117

ABSTRACT:
The present invention relates to an integrated circuit adapted to perform the function of a diode of the DIAC type, the circuit having an input terminal and an output terminal. The circuit includes a first input transistor having a first terminal connected to a fixed voltage reference, a second terminal, and a control terminal coupled to the input terminal of the circuit. The circuit further includes second and third transistors in a current mirror configuration, each having a first terminal for coupling to the input terminal of the circuit, and a second terminal, and associated control terminals connected together and coupled to the second terminal of the first input transistor, the second terminal of the second transistor being connected to the control terminal of the first transistor. Finally, the circuit includes a fourth output transistor connected, with first and second terminals, between the output terminal and the input terminal of the circuit, the fourth output transistor also having a control terminal connected to the second terminal of the third transistor.

REFERENCES:
patent: 3772470 (1973-11-01), Cowpland et al.
patent: 4047054 (1977-09-01), Ahmed
patent: 4053796 (1977-10-01), Plassche
patent: 4184087 (1980-01-01), Nutz
patent: 4350949 (1982-09-01), Fujita
patent: 4525638 (1985-06-01), Gray
patent: 5049790 (1991-09-01), Herfurth et al.
patent: 5642065 (1997-06-01), Choi et al.

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