| 摘要 |
PURPOSE:To reduce the number of adjusting part of an output level independently of the dispersion of a glass delay line by outputting a direct transmission signal as it is, inputting the output of the glass delay line to a differential amplifier variably to take out a difference signal and an added signal. CONSTITUTION:A video signal from a signal source 33 is amplified and applied to an ultrasonic solid-state delay line 30 through an antiresonator coil 31. The output of the delay line 30 is impressed to a constant current transistor (TR)4 in a differential amplifier 34 through a capacitor C1. The direct transmission signal is applied from a node between an antiresonator coil 31 and a resistor R2 to one input terminal of the differential amplifier 34 through a capacitor C2 and an added signal Y and a difference signal C are obtained from the collector of the TR2 and the collector of the TR3 respectively as the outputs of the differential amplifier 34. |
