Push-pull pulse amplifier having improved turn-on and turn-off t

Details Push-pull pulse amplifier having improved turn-on and turn-off t Push-pull pulse amplifier having improved turn-on and turn-off t

1977-11-11

1978-09-19

Mullins, James B.

Amplifiers

With semiconductor amplifying device

Including push-pull amplifier

307251, 330251, 330269, 330300, H03F 316, H03F 326, H03K 1760

Patent

active

041157400

ABSTRACT:
A pulse amplifier formed of first and second field effect transistors, each exhibiting an inherent input capacitance at its gate electrode, the field effect transistors being connected in push-pull relation whereby their drain or source electrodes are connected to a common output terminal. First and second resistive circuits are connected in a pulse supply circuit to supply pulse signals to the respective gate electrodes of the field effect transistors. Each of the resistive circuits exhibits a higher resistance when a pulse is supplied therethrough to turn the respective field effect transistor ON and a lower resistance when the pulse is terminated to turn the respective field effect transistor OFF. The higher resistance of the resistive circuit cooperates with the inherent input capacitance of the respective field effect transistor to provide a higher discharge time constant to turn that field effect transistor ON and the lower resistance cooperates with the inherent input capacitance of the field effect transistor to provide a lower charge time constant to turn that field effect transistor OFF, whereby the field effect transistors are not ON concurrently. In a preferred embodiment, the field effect transistors are complementary field effect transistors so that a positive-going pulse turns one of those field effect transistors OFF while turning the other ON, and a negative-going pulse turns the one field effect transistor ON while turning the other OFF.

REFERENCES:
patent: 4028633 (1977-06-01), Rogers et al.

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