Title:
RADIATION DETECTOR HAVING IONIZABLE GAS ON INTEGRATED CIRCUIT
Document Type and Number:
Japanese Patent JPS63308591
Kind Code:
A
Abstract:
A device for detecting and measuring small amounts of charge or current. The device comprises at least one charge detection subassembly (1,n) with an integrated circuit (100,120,130), a collecting electrode (110,E₁,155,170) that comprises an electrically conductive sense pad mounted on said integrated circuit (100,120,130) for collecting charge accumulated thereon, an amplifying means (20,To,157,174,176) for generating a signal representative of the collected charge. Said amplifying means including an input transistor (To) mounted on said integrated circuit and electrically connected to said collecting electrode (170). A controlled discharge means (176,T₁, T₂) is provided for removing charge from said collecting electrode (170). Furtheron means (22,24,186, 188) are provided for minimizing inaccuracies in said device due to leakage currents to said collecting electrode (110,E₁,155,170) from said controlled discharge means or said amplifying means. The device additionally comprises interface means for (36, 174, 212) buffering said signal from said amplifying means, detector control means (30,184) for controlling said discharge means, and means for supplying power (173, 206) to said amplifying means, said controlled discharge means, and said detector control means.
Inventors:
AASAA II UUBAA ZA SAADO
Application Number:
JP822188A
Publication Date:
December 15, 1988
Filing Date:
January 18, 1988
Export Citation:
Assignee:
MEDRAD INC
International Classes:
G01T1/185; G01T1/24; G01T7/12; G01T1/18; H01J47/02; H01L31/09; (IPC1-7): G01T1/18; G01T1/24; H01L31/00
Domestic Patent References:
| JPS5528974B2 | 1980-07-31 | |||
| JPS6148784A | 1986-03-10 | |||
| JP57140408B | ||||
| JPS60108783A | 1985-06-14 |
Attorney, Agent or Firm:
Minoru Nakamura (4 outside)