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Title: High voltage electrical amplifier having a short rise time

Abstract

A circuit, comprising an amplifier and a transformer is disclosed that produces a high power pulse having a fast response time, and that responds to a digital control signal applied through a digital-to-analog converter. The present invention is suitable for driving a component such as an electro-optic modulator with a voltage in the kilovolt range. The circuit is stable at high frequencies and during pulse transients, and its impedance matching circuit matches the load impedance with the output impedance. The preferred embodiment comprises an input stage compatible with high-speed semiconductor components for amplifying the voltage of the input control signal, a buffer for isolating the input stage from the output stage; and a plurality of current amplifiers connected to the buffer. Each current amplifier is connected to a field effect transistor (FET), which switches a high voltage power supply to a transformer which then provides an output terminal for driving a load. The transformer comprises a plurality of transmission lines connected to the FETs and the load. The transformer changes the impedance and voltage of the output. The preferred embodiment also comprises a low voltage power supply for biasing the FETs at or near an operational voltage.

Inventors:
 [1];  [2]
  1. Pleasanton, CA
  2. Livermore, CA
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
OSTI Identifier:
867993
Patent Number(s):
US 5049836
Assignee:
United States of America as represented by United States (Washington, DC)
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
voltage; electrical; amplifier; rise; time; circuit; comprising; transformer; disclosed; produces; power; pulse; fast; response; responds; digital; control; signal; applied; digital-to-analog; converter; suitable; driving; component; electro-optic; modulator; kilovolt; range; stable; frequencies; transients; impedance; matching; matches; load; output; preferred; embodiment; comprises; input; stage; compatible; high-speed; semiconductor; components; amplifying; buffer; isolating; plurality; current; amplifiers; connected; field; effect; transistor; fet; switches; supply; provides; terminal; transmission; lines; fets; changes; biasing; near; operational; volt range; voltage power; embodiment comprises; power pulse; signal applied; voltage electrical; output terminal; field effect; transmission lines; control signal; transmission line; preferred embodiment; power supply; response time; fast response; impedance matching; rise time; effect transistor; output stage; output impedance; current amplifier; digital control; digital-to-analog converter; input control; electro-optic modulator; transformer comprises; analog converter; voltage electric; lines connected; /330/

Citation Formats

Christie, David J, and Dallum, Gregory E. High voltage electrical amplifier having a short rise time. United States: N. p., 1991. Web.
Christie, David J, & Dallum, Gregory E. High voltage electrical amplifier having a short rise time. United States.
Christie, David J, and Dallum, Gregory E. 1991. "High voltage electrical amplifier having a short rise time". United States. https://www.osti.gov/servlets/purl/867993.
@article{osti_867993,
title = {High voltage electrical amplifier having a short rise time},
author = {Christie, David J and Dallum, Gregory E},
abstractNote = {A circuit, comprising an amplifier and a transformer is disclosed that produces a high power pulse having a fast response time, and that responds to a digital control signal applied through a digital-to-analog converter. The present invention is suitable for driving a component such as an electro-optic modulator with a voltage in the kilovolt range. The circuit is stable at high frequencies and during pulse transients, and its impedance matching circuit matches the load impedance with the output impedance. The preferred embodiment comprises an input stage compatible with high-speed semiconductor components for amplifying the voltage of the input control signal, a buffer for isolating the input stage from the output stage; and a plurality of current amplifiers connected to the buffer. Each current amplifier is connected to a field effect transistor (FET), which switches a high voltage power supply to a transformer which then provides an output terminal for driving a load. The transformer comprises a plurality of transmission lines connected to the FETs and the load. The transformer changes the impedance and voltage of the output. The preferred embodiment also comprises a low voltage power supply for biasing the FETs at or near an operational voltage.},
doi = {},
url = {https://www.osti.gov/biblio/867993}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1991},
month = {1}
}