| 摘要 |
PURPOSE:To obtain a track hold circuit operated at high speed and with high accuracy, by dividing an input signal into three signals with equal sizes by a power divider, and applying the signals on the input side and the driving side of a diode bridge. CONSTITUTION:The input signal inputted to a terminal 1 is divided into three signal equally by the power divider 20, and the outputs are applied on the driving sides C and D of the diode bridge 2. On the driving sides C and D, sampling pulses Q and -Q from a sampling pulse driver 21 are added, and the waveform is generated as the one in which the sampling pulses and the outputs of the divider are added. In other words, the input side A and the driv ing sides C and D of the bridge 2 are oscillated by the output of the divider 20, and the potential difference of each of diodes D1-D4 constituting the bridge 2 goes to the same level as the sampling pulses Q and -Q of the driver 21, and the switching of both mode of tracking and holding is performed at a time when the potential becomes equal to the threshold valve of the diode. Therefore, no deviation in the timing of the pulses occurs.
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