Automatic pole-zero adjustment circuit for an ionizing radiation

Details Automatic pole-zero adjustment circuit for an ionizing radiation Automatic pole-zero adjustment circuit for an ionizing radiation

1988-01-15

1989-09-12

Mullins, James B.

Amplifiers

With semiconductor amplifying device

Including frequency-responsive means in the signal...

250369, 328167, H03F 100

Patent

active

048664006

ABSTRACT:
An automatic pole-zero adjustment circuit is provided for an ionizing radiation spectroscopy system which comprises a pole-zero network circuit, coupled to the system and having an electrical chracteristic which varies as a function of an input control signal, for permitting pole-zero adjustment of the system; a sampling circuit coupled to the system, for sampling a segment of the trailing edge of random pulses passing through the system; and a control signal circuit coupled to the sampling circuit, for generating the input control signal as a function of the sampling to permit cancellation by the pole-zero network circuit of undershoot in the system. The pole-zero network circuit may include a real pole in the signal path of the network circuit set coincident with the real pole of a high pass filter in the system itself. The control signal provided to the pole-zero network circuit is digitized.

REFERENCES:
patent: 4481466 (1984-11-01), Roos et al.
patent: 4491799 (1985-01-01), Giardinelli
Nowlin et al., "Elimination of Undersirable Undershoot in the Operation and Testing of Nuclear Pulse Amplifiers", Rev. Sci. Instr., Instr., vol. 36, No. 12, Dec. 1965, pp. 1830-1839.
Casoli et al., "Active Pole-Zero Cancellation Feedback Loop to Enhance High-Rate Performances of Nuclear Spectroscopy Systems", Nucl. Inst. and Meth., vol. 156, 1978, pp. 559-566.
Cora et al., "Automated Regulation of Critical Parameters and Related Design Aspects of Spectroscopy Amplifiers with Time-Invariant Filters", I.E.E.E. Trans. on Nucl. Sci., NS-29(1), Feb. 1982, pp. 609-613.

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