Title:
測定増幅器
Document Type and Number:
Japanese Patent JP3580817
Kind Code:
B2
Abstract:
PCT No. PCT/EP94/01686 Sec. 371 Date Jun. 13, 1996 Sec. 102(e) Date Jun. 13, 1996 PCT Filed May 26, 1994 PCT Pub. No. WO95/00856 PCT Pub. Date Jan. 5, 1995A measurement amplifier has an integrator circuit (2) and a reference current source (33) which supplies a reference current to the input of the integrator when the voltage set at the output of the integrator (2) exceeds or falls below a reference voltage. In addition, a differentiator, for example, is provided which receives the output voltage of the integrator (2) and supplies an output signal which is proportional to the variation in time of the output voltage of the integrator. The output voltage of the differentiator is proportional to the input current to be measured by the measurement amplifier. The measurement amplifier allows very weak input currents to be rapidly and accurately detected.
Inventors:
Rolf, Norbert
Application Number:
JP50237295A
Publication Date:
October 27, 2004
Filing Date:
May 26, 1994
Export Citation:
Assignee:
Riebold Actien Gezershaft
International Classes:
G01R19/00; G01R19/252; G01R35/02; G06G7/186; H03F1/30; H03F3/70; G01R1/30; (IPC1-7): G01R19/252; H03F3/70
Domestic Patent References:
| JP58223762A | ||||
| JP63133071A | ||||
| JP60178368A | ||||
| JP58180955A |
Foreign References:
| DE3322471A1 |
Attorney, Agent or Firm:
Toshio Yano
Toshiomi Yamazaki
Takuya Kuno
Reinhard Einsel
Toshiomi Yamazaki
Takuya Kuno
Reinhard Einsel