| 摘要 |
The switch 1, for high-frequency signals, receives two positive low voltages S1, S2 and one negative high voltage S3; it has a positive transfer function and converts an input logic signal (STE, 5): + 5 V, 0 V into an output signal (STS, 6): + 4 V, -500 V heading for a load 11 consuming about 1 A under 4 V and not consuming, under -500 V, by turning off a pin diode D6 which also belongs to a main HF signal path. According to the invention, the switch includes inverting means T5, T6, an output stage T1, a first series assembling consisting of three second p-channel Mosfet transistors T21, T22, T23 and a ballast circuit 8, T4, an input stage T3, and a circuit for activating turning off of the second transistor T21 connected to S2, R15, D4. Application the tuning of a power filter in transmission. <IMAGE>
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