Controllable limiter attenuator circuit with an AsGa intermediate region diode and use of such a circuit

摘要

1. UHF circuit intended to limit and attenuate in a controlled way the level of a UHF signal flowing on a UHF line (1), characterised in that it includes, on the one hand, in parallel between the line and earth, an AsGa PIN diode (2), the anode (3) of which is connected to the line (1) and the cathode (4) to earth, a low-pass filter (5), one end of which is connected to the line (1) and the other to the cathode (8) of a diode (6), the anode (7) of this diode (6) being connected to earth and, on the other hand, a circuit (9) for control of the value of the biasing of the AsGa PIN diodes connected to the line (1). IMAGE