Amplitude variable pulse generating circuit

Details Amplitude variable pulse generating circuit Amplitude variable pulse generating circuit

1989-07-20

1992-08-11

Miller, Stanley D.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307268, 307270, 307571, 328 53, 328 72, H03L 500, H03K 301, H03K 508, H03K 1700

Patent

active

051381877

ABSTRACT:
An amplitude variable pulse generator is provided with two voltage supply sources. The first voltage source supplies a variable voltage which determines the amplitude of the output pulse. The second voltage source is a fixed or constant voltage source which provides a voltage lower in value than the first voltage. The second voltage source quickly pulls up a voltage between a drain and a source of a switching MOSFET, which generates the output pulse, by providing a charging voltage for an output capacitance of the MOSFET. By doing so, the output capacitance of the MOSFET is quickly reduced, and the trailing edge of the output pulse is not rounded even when the variable voltage is low. As a result, the waveform of the output pulse is not rounded for a very small amplitude pulse. Resolution of a supersonic wave device especially a supersonic diagnostic device is thereby improved.

REFERENCES:
patent: 4710654 (1987-12-01), Saitoh et al.

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