| 摘要 |
A constant current circuit delivering a constant current to a load connected between first and second output terminals comprises, a reference current generator configured to generate a reference current, a current mirror circuit configured to amplify the reference current, an output transistor configured to deliver the constant current based on an output of the current mirror circuit, a signal source configured to deliver a pulse control signal, an auxiliary switching circuit having a switch terminal configured to deliver a switch signal in response to the pulse control signal, and a discharge terminal configured to deliver a discharge signal to the current mirror circuit when the switch signal is stopped; and a switch circuit configured to turn off the output transistor with receiving the switch signal.
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