Power-transistor slew-rate controller employing only a single ca

Details Power-transistor slew-rate controller employing only a single ca Power-transistor slew-rate controller employing only a single ca

1994-05-31

1995-11-21

Callahan, Timothy P.

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Current driver

327108, 327423, 363132, H03K 300

Patent

active

054690960

ABSTRACT:
In a half-bridge output stage employing a complementary pair of output power transistors, each driven through an integrating stage for controlling the slew-rate, a single integration capacitance is conveniently shared by the two integrating stages that drive the power transistors. A pair of switches connect the single integrating capacitance to the input of either one of the two integrating stages and are controlled by a pair of nonoverlapping signals that have a certain advance with respect to the pair of logic signals that drive the half-bridge stage. In the case of a driving system of a multi-phase machine, the two configuring switches of the single integration capacitor may be driven by a pair of control signals that drive a different phase winding of the multi-phase machine, thus eliminating the need for dedicated circuitry for generating said pair of anticipated signals to control the configuration switches.

REFERENCES:
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patent: 5289051 (1994-02-01), Zitta
patent: 5311150 (1994-05-01), Engbretson et al.

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