| 摘要 |
PURPOSE:To exclude electron disturbance by controlling the variable period of an oscillation frequency on a double random basis and varying a transmission frequency irregularly. CONSTITUTION:A random signal generating circuit 5 is a noise generating circuit which utilizes the thermal noise, etc., of a diode, and its output signal varies at random as shown in a figure (a). The output signal of the circuit 5 is impressed to a sample holding circuit 5, and the signal of a random signal generating circuit 8 similar to the circuit 5 is impressed to a timing circuit 7 respectively. The circuit 7 outputs timing pulses which vary in interval in responding with the output signal of the circuit 8 as shown in a figure (c), and the output of the circuit 5 is sampled by the circuit 6 by the timing signal of the circuit 7 to obtain the output of the circuit 6 as shown in a figure (d). The output of the circuit 6 is converted by a servoamplifier 3 into a sine wave signal which varies in an amplitude at random at every randomized interval as shown in a figure (d), and a tuning mechanism 2 varies the frequency of a magnetron 1 at a speed proportional to the signal of the amplifier 3. |
