High voltage power transistor circuits

Details High voltage power transistor circuits High voltage power transistor circuits

1987-12-14

1989-06-06

Miller, Stanley D.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307270, 307241, 3072961, 307362, H03K 1760, H03K 301, H03K 5153, H03K 1756

Patent

active

048374571

ABSTRACT:
A high voltage power transistor circuit composed of a pair of transistors (TR1, TR2) serially connected through an inductor (L) to a supply voltage. Associated components are connected to the transistors which determine various periods of operation. In order to ensure that the transistors (TR1, TR2) are rendered non-conducting simultaneously, sensors (S1, S2) sense their change in base current to produce pulses in monostable multivibrators (M1, M2) whose relative phases are compared in a digital phase comparator (PC). The drive for each transistor (TR1, TR2) is provided by an associated driver stage (DR1, DR2) via an associated device (DC1, DC2) having a characteristic used to control the cut-off of its associated transistor. One of the devices (DC2) has a variable characteristic which is controlled by the output of the phase comparator (PC) to ensure the required simultaneous non-conduction of the transistors.

REFERENCES:
patent: 4213068 (1980-07-01), Ahmed
patent: 4227099 (1980-10-01), Houkes
patent: 4540933 (1985-09-01), Teuling
patent: 4562361 (1985-12-01), Hattori et al.
patent: 4564769 (1986-01-01), Melamed
patent: 4701631 (1987-10-01), Chieli
Hower, "A New Method of Characterizing the Switching Performance of Power Transistor", Industry Application Society IEE-IAS 1978.

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