| 摘要 |
A bipolar switch is disclosed having a near zero standby current characteristic, low output impedance in the "on" state, and near infinite impedance in the "off" state. The switch is responsive to a control signal to apply regulated power to a load. The switch includes a turn-on detect circuit which is powered solely from the control signal, and switching circuitry which is powered from a power source but which normally draws no standby current when the switch is in its "off" state. The switching circuitry includes speed-up circuitry to permit rapid turn-on, circuitry which employs positive feedback to achieve high current gain, and circuitry for rapidly turning off the switch.
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