Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons
Patent
1982-03-29
1984-10-16
Anagnos, Larry N.
Electrical transmission or interconnection systems
Nonlinear reactor systems
Parametrons
307442, 307584, 307270, 307443, H03K 19094, H03K 19003, H03K 19007
Patent
active
044777418
ABSTRACT:
This describes a tristate driver circuit designed such that it will not be destroyed by excessive high voltage conditions when two such drivers are connected to a bus at the same time. The circuit accomplishes this with parallel high current, low impedance and low current, high impedance output devices, coupled to means for causing the high current, low impedance devices to supply, to the circuit output, only the initial high currents required without inhibiting the low current, high impedance devices from maintaining the steady state conditions needed to clamp the output at the desired output level. The circuit is arranged to cause both high and low current output devices to be initially conductive to charge the output terminal to the desired level, but to subsequently shut off the high current, low impedance device while keeping the low current, high impedance device in a condition to clamp the output at the desired level. This result is achieved by providing the high current output devices with means for automatically terminating once the initially required high current has been supplied to the output.
REFERENCES:
patent: 3649851 (1972-03-01), Cohen
patent: 3946245 (1976-03-01), McClaughry
patent: 4032795 (1977-06-01), Hale
patent: 4217502 (1980-08-01), Suzuki et al.
patent: 4291242 (1981-09-01), Schriber
patent: 4329600 (1982-05-01), Stewart
patent: 4363978 (1982-12-01), Heimbigner
patent: 4404474 (1983-09-01), Dingwall
patent: 4421994 (1983-12-01), Puri et al.
Lee et al., "Low-Power Dissipation Fet Driver Circuit"; IBM Tech. Discl. Bull.; vol. 14, No. 4, pp. 1084-1085; 9/1971.
Anagnos Larry N.
International Business Machines - Corporation
Thornton Francis J.
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