Ultra-low noise high bandwidth interface circuit for single-phot

Details Ultra-low noise high bandwidth interface circuit for single-phot Ultra-low noise high bandwidth interface circuit for single-phot

1997-08-13

1999-07-27

Westin, Edward P.

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

250214LA, H01L 2714, H03F 316

Patent

active

059294345

ABSTRACT:
An ultra-low noise, high gain interface circuit for single-photon readout of known photodetectors from the x-ray to long IR bands at video frame rates. The detector current modulate's a load FET's gate-to-source voltage, which in turn modulates the gate-to-source voltage of a gain FET thereby producing a signal current that is an amplified facsimile of the detector current. The load FET's gate-to-source voltage is connected in the negative feedback loop of a low noise, high gain amplifier. This effectively reduces the resistance seen by the photodetector by the gain of the amplifier thereby reducing the interface circuit's RC time constant by the same amount. Because the amplifier pins the load FET's gate voltage for a given flux level, the load FET's 1/f noise is transferred to the amplifier thereby enabling single-photon readout sensitivity.

REFERENCES:
patent: 3770968 (1973-11-01), Hession et al.
patent: 3927383 (1975-12-01), Fjarlie et al.
patent: 4473836 (1984-09-01), Chamberlain
patent: 4555623 (1985-11-01), Bridgewater et al.
patent: 4567363 (1986-01-01), Goodnough
patent: 4855687 (1989-08-01), Hebert
patent: 5399989 (1995-03-01), Chern
patent: 5473467 (1995-12-01), Miller
patent: 5572074 (1996-11-01), Standley
patent: 5589881 (1996-12-01), Dunham et al.
Chamberlain and Lee, "A Novel Wide Dynamic Range Silicon Photodector and Linear Imaging Array", IEEE Transactions on Electronic Devices, vol. ED-31, No. 2, Feb. 1984, pp. 175-182.
Kozlowski et al., "Infrared Detectors and Focal Plane Arrays IV", SPIE-The International Society for Optical Engineering, vol. 2746, 1996, pp. 93-100 .

Affiliated with

Also associated with

Rating

Ultra-low noise high bandwidth interface circuit for single-phot does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Ultra-low noise high bandwidth interface circuit for single-phot, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Ultra-low noise high bandwidth interface circuit for single-phot will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-881259