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1. 发明专利

JP2006226684A TEST EQUIPMENT 审中-公开
公开(公告)号：JP2006226684A
公开(公告)日：2006-08-31
申请号：JP2005037163
申请日：2005-02-15
申请人： SHIBASOKU CO LTD
发明人： YAMAZAKI MITSUO , NISHINO KENJIRO
IPC分类号： G01R31/28 , G01R31/26
摘要： PROBLEM TO BE SOLVED: To further shorten the test time as compared to before on integrated circuits of multipin output which operate on a high voltage, such as a driver IC for PDP. SOLUTION: This test equipment is provided with a plurality of measuring module multiplex board 11 for outputting DC power for each pin of an object to be tested 5, and a plurality of high-voltage measuring module 6 for measuring at least the voltage of the DC power impressed on each pin via each measuring module multiplex board 11. By using them, simultaneously and in parallel, it tests the characteristics of each pin. Each measuring module multiplex board 11 is provided with an instantaneous overcurrent protection circuit 14 for making a load current flow through a DC circuit of a MOSFET and a current detection circuit, making a bipolar transistor operate in an ON-state at the current detection circuit by the increase of the load current, and raising a bias voltage of the MOSFET. COPYRIGHT: (C)2006,JPO&NCIPI

2. 发明专利

JP2002271159A FREQUENCY CHARACTERISTICS ADJUSTMENT CIRCUIT FOR ATTENUATOR 失效
公开(公告)号：JP2002271159A
公开(公告)日：2002-09-20
申请号：JP2001070633
申请日：2001-03-13
申请人： SHIBASOKU CO LTD
发明人： SUGIHARA KIYOYUKI , NEI SHUNSUKE , NISHINO KENJIRO
IPC分类号： H03H7/25
摘要： PROBLEM TO BE SOLVED: To provide a frequency characteristics adjustment circuit which enables adjustment of the frequency characteristics of an attenuator quickly and accurately. SOLUTION: The attenuator comprises a parallel circuit of a first resistor R1 and a first capacitor C1 , which are formed between an input terminal Tin and an output terminal Tout , and a parallel circuit of a second resistor R2 and a second capacitor C2 , which is formed between the output terminal Tout and a ground GND. The attenuator also comprises a series circuit of a third capacitor C3 and a variable capacity diode CD1 which is formed between the output terminal Tout and the ground GND, and a power supply section V, which applies a required DC voltage to the variable capacity diode CD1 via the third resistor R3 . Bt adjusting the voltage of the power supply section V, the capacity of the variable capacity diode CD1 is adjusted, so as to adjust the frequency characteristics of the attenuator to be flat.

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