| 摘要 |
1. A circuit configuration for the purpose of suppressing interference pulses when transmitting digital signals of variable time spacing and amplitudes, comprizing a number of time constant elements (4, 5, 6, 7), whereby the received signals are connected to an amplifier (V1), to whose output is connected a rectifier (3), which connects the rectified signal voltage across the time constant elements to an output stage (V2), this consisting of at least one transistor (8), whereby the time constant (T1) of the first time constant element (4, 5, 6), which is dimensioned according to the greatest spacing of the useful signals (N), is appreciably greater than the time constant of the second time constant element (5, 7), this being dimensioned according to the shortest spacing of the useful signals (N), characterised in that the time constant element (5, 7) which has the smaller time constant (T2) is connected to the output stage (V2) in such a manner that the quiescent dc voltage level, which is pending on the time-constant element, does not fall below the operating voltage level that has been reduced by the base-emitter voltage of the transistor (8) in the output stage (V2), the emitter of which is connected to the stabilized operating voltage source (UB ), and that output signals that are freed of noise signals may be tapped from a resistor (9) which is included in the collector circuit of the transistor (8). |
