Driver circuit receiving input voltage and providing correspondi

Details Driver circuit receiving input voltage and providing correspondi Driver circuit receiving input voltage and providing correspondi

1989-03-03

1990-11-20

Miller, Stanley D.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307475, 307557, 307494, H03K 301, H03K 326

Patent

active

049725173

ABSTRACT:
A first comparator compares a voltage of a pair of primary terminals of a pulse transformer with a first reference voltage, to apply an output voltage corresponding to the voltage difference therebetween to a gate of an N channel MOSFET. The N channel MOSFET is responsive to the output voltage for controlling current flowing through a primary side of a pulse transformer. Consequently, even if the impedance of a load connector to a pair of secondary terminals of the pulse transformer is fluctuated, a voltage between the pair of secondary terminals is kept constant. A second comparator compares the output voltage of the first comparator with a second reference voltage, to apply an output voltage corresponding to the voltage difference therebetween to a gate of a P channel MOSFET. When the load impedance becomes low, the P channel MOSFET performs control such that the output voltage of the second comparator does not exceed a predetermined value. Consequently, current flowing through the primary side of the pulse transformer is limited not to exceed a constant value. Thus, a voltage between output terminals does not exceed a constant value.

REFERENCES:
patent: 3780316 (1973-12-01), Wilhelm
patent: 4583203 (1986-04-01), Monk
patent: 4591739 (1986-05-01), Nagano
patent: 4727265 (1988-02-01), Nanbu et al.
patent: 4748346 (1988-05-01), Emori
patent: 4788458 (1988-11-01), Kinoshita et al.

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