High-frequency characteristics are improved power MOSFET amplifier


Posted on Mar 28, 2007    12220

And 3 gn same basic circuit, and the second stage is a differential output of the power MOSFET, 2SJ77, a current mirror circuit uses 2SK214. While the operating current is only


High-frequency characteristics are improved power MOSFET amplifier
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6mA, however, because the power supply voltage up to sov, the transistor may have a fever, so install a small heat sink. the output stage chestnut direct drive mode, since without emitter follower buffer, to increase the load driving circuit, and if the need to improve the conversion rate, may try to increase the Tri- * within the range of allowable loss drain on current initiatives. power MOSFET often have high oscillation, the oscillation to be suppressed relatively sleepy difficult, simple measures are (as close to the gate position) at the gate series resistance ( mark Ro, but want to sacrifice some high frequency characteristics, Ra resistance varies with element member varies, usually between 50Q ~ 500Q.




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