Low-frequency power amplifier
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United States of America Patent
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-
Jan 18, 1983
Grant Date -
N/A
app pub date -
Aug 5, 1980
filing date -
Aug 5, 1980
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A compact and inexpensive LF power amplifier is disclosed. A plurality of pulse trains which are phase shifted relative to each other are width-modulated by an input LF signal. The modulated pulse trains are individually amplified, preferably by means of a plurality of respective power transformers and switch elements. The switch elements include any suitable combination of electron tubes and semiconductor switches. The keying ratio of the amplifier is improved by associating the pulse trains in pairs, the two members of each pair being phase shifted 180.degree. relative to each other. The amplified pulse trains are superimposed to form a single combined amplified pulse train.
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