SELF-EXCITED OSCILLATION CIRCUIT
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United States of America Patent
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Issued Date -
Sep 16, 2010
app pub date -
Apr 24, 2007
filing date -
Jun 21, 2006
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A self-excited oscillation circuit of the invention includes a turn-OFF transistor that turns OFF a transistor, a turn-OFF capacitor that outputs a voltage to the base of the turn-OFF transistor, and a bias resistance that charges the turn-OFF capacitor with a voltage in magnitude corresponding to a drain current that flows when the transistor turns ON. A resistance is connected between the turn-OFF capacitor and a power supply portion. Accordingly, charges are accumulated in the turn-OFF capacitor so that the voltage will not drop to or below a bias voltage. It thus becomes possible to make the bias resistance smaller, which can in turn reduce an energy loss at the bias resistance.
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