Pulse height analyzer for spectroscopy thermal multigate decay w

Details Pulse height analyzer for spectroscopy thermal multigate decay w Pulse height analyzer for spectroscopy thermal multigate decay w

1990-06-08

1991-10-08

Hannaher, Constantine

Radiant energy

Geological testing or irradiation

Well testing apparatus and methods

250256, 250261, 250264, 364422, G01V 504, G01V 508

Patent

active

050556754

ABSTRACT:
A pulse height analyzer for spectrocopy thermal multigate decay well logging systems is disclosed and has an input section comprising a peak time determining circuit locating a peak occurrence. The peak is determined relative to a threshold voltage determining circuit. On peak detection, a timing signal is formed for a control circuit. This operates a sample and hold switch at the output of an amplifier for the input. This switch inputs to an A/D converter driving a buffer. Various handshake signals cooperate with a telemetry system to transfer the peak time A/D valve for pulse height measurement.

REFERENCES:
patent: 3959648 (1976-05-01), Pitts, Jr. et al.
patent: 4042824 (1977-08-01), Pitts, Jr. et al.
patent: 4302669 (1981-11-01), Allen et al.
patent: 4471435 (1984-09-01), Meisner
patent: 4707741 (1987-11-01), Stratton
patent: 4788424 (1988-11-01), Preeg

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