Drive circuit for controlling current output rise and fall times

Details Drive circuit for controlling current output rise and fall times Drive circuit for controlling current output rise and fall times

1978-09-25

1980-08-05

Anagnos, Larry N.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307263, 330288, 330300, H03F 316, H03F 3193, H03K 110

Patent

active

042163935

ABSTRACT:
In a drive circuit having output current passing through at least one bipolar transistor, the rise and fall times of the output current are predetermined by controlling the rate of current change in the master path of a current mirror amplifier which has a separate slave path connected to supply base current for each bipolar transistor. The drain-source channel of an MOS transistor is connected to selectively supply current flow through the master path of the current mirror amplifier in one embodiment of the rate control means and the gate of the MOS transistor is connected in parallel with a capacitor to the output of a CMOS inverter to which control signals are applied. Multiple outputs are driven from a single control input in another embodiment having a single master path and multiple slave paths incorporated into the current mirror amplifier with each slave path being connected to supply base current for a separate bipolar output transistor and being coupled to the master path through a separate transmission gate in a decoder which includes a transmission gate for each slave path.

REFERENCES:
patent: 3644838 (1972-02-01), Graf
patent: 3943380 (1976-03-01), Morgan
patent: 4038607 (1977-07-01), Schade, Jr.
patent: 4047059 (1977-09-01), Rosenthal
patent: 4064506 (1977-12-01), Cartwright, Jr.
patent: 4068184 (1978-01-01), Ahmed
patent: 4069431 (1978-01-01), Kucharewski
patent: 4078206 (1978-03-01), Crowle
patent: 4092612 (1978-05-01), Schade, Jr.
patent: 4117416 (1978-09-01), Schade, Jr.
patent: 4152663 (1979-05-01), Van De Sande

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