Output monitoring circuit for a radiation generator apparatus

Details Output monitoring circuit for a radiation generator apparatus Output monitoring circuit for a radiation generator apparatus

1991-04-25

1992-10-13

Howell, Janice A.

X-ray or gamma ray systems or devices

Electronic circuit

Exposure timer

378108, 378207, H05G 142

Patent

active

051557525

ABSTRACT:
An output monitoring circuit for a radiation generator apparatus includes a pulse integrator circuit 37 for integrating each pulse of the output of the detector 10 supplied via a pulse amplifier 36. Further, a triangular waveform generator 34 outputs a sawtooth waveform E which is reset to the ground level at each rising edge of the trigger pulses D generated by the pulse trigger generating circuit 1 for the radiation generator apparatus, and a sample hold circuit 35 holds each peak value of the waveform E of the triangular waveform generator 34 and outputs waveform F the level of which is proportional to the pulse repetition period of the pulses of the detector 10. A divider circuit 39, having a numerator input coupled via an amplifier 38 to the pulse integrator circuit 37 and a denominator input coupled to the sample hold circuit 35, outputs a signal the level of which corresponds to the temporal average of the intensity of the radiation pulses generated by the radiation generator apparatus. The output of the divider circuit 39 is displayed via a radiation output intensity display 20 and is supplied to an integrating counter 42 via a voltage frequency converter 40 and frequency divider 41. The output of the divider circuit 39 is also fed back to the control unit 32 for controlling the radiation generation.

REFERENCES:
patent: 3975640 (1976-08-01), Boux et al.
patent: 4035645 (1977-07-01), Meyer
patent: 4250103 (1981-02-01), Vatne et al.

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