公开(公告)号：JPS5821578A

公开(公告)日：1983-02-08

申请号：JP12085181

申请日：1981-07-31

Applicant: SHIMADZU CORP

Inventor： AKUTAGAWA TETSUO ,  HIRAOKA MASARU

IPC: H01J47/08 ,  G01T1/18

Abstract: PURPOSE:To achieve earier measurement starting time while preventing damage to a meter by discharging charged electric charge quickly through a clamp circuit while clamping overvoltage therewith. CONSTITUTION:Ionization current generated from an ionization chamber 1 is amplified with an arithmetic amplifier 2 and a negative output current is generated to deflect a pointer of a meter 3. On the other hand, the arithmetic amplifier 2 is connected to the ground on the negative side of a power source 4 thereof via a series circuit of a variable resistance 5 and a diode 6 and two diodes 7 and 8 are connected to an output terminal thereof. When output voltage V0 of the arithmetic amplifier 2 is V0>V2-(VR+V1), it is clamped to V2-(VR+V1). When it is V0

公开(公告)号：JPS5428558A

公开(公告)日：1979-03-03

申请号：JP9534177

申请日：1977-08-06

Applicant: SHIMADZU CORP

Inventor： AKUTAGAWA TETSUO

IPC: H03K6/00 ,  H03K4/00 ,  H03K5/00 ,  H03K5/01 ,  H03K5/12 ,  H03K5/159

Abstract: PURPOSE:To obtain the output pulse by contracting only the pulse duration without giving the attenuation or the change to the amplitude, by inserting the resistor and the concentrated time constant type delay circuit of T-type connection of the coil and the capacity in series between an optional intermediate point of the circuit which connects the positive polarity input terminal of the pulse transmission circuit and the opposing negative polarity circuit.