PURPOSE: To have actuation and no actuation of the amplifier of a signal processing circuit when a horizontal switch is turned on and off respectively, by inserting a reset switch between a preamplifier and a feedback resistance.
CONSTITUTION: A feedback resistance Rf has 100∼500kΩ resistance value and 10∼30pF output line capacity and a preamplifier has about 100 gain Av. The resistance Rf is set in parallel to the preamplifier. Under such conditions, the input impedance Zin of the preamplifier is set as 100kΩ/100=1kΩ during operation of the preamplifier. Then the signal charge of the capacity 66 is quickly read out. While the impedance Zin is equal to the resistance Rf itself while the preamplifier has no actuation, and the time constants of the capacity 66 and the impedance Zin are set at ≥1μs. Then the signal is read out at a high speed of 5∼20MHz. Therefore the signal charge is held at an output capacity.
KUBO SEIJI
TAKEMOTO KAYAO
TAKAHASHI KENJI
AKIYAMA TOSHIYUKI
NAGAHARA SHIYUUSAKU
NODA MASARU
HANAMURA SHIYOUJI
AOKI MASAKAZU
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