Scintillation tube dynamic calibration monitor and feedback regu

Details Scintillation tube dynamic calibration monitor and feedback regu Scintillation tube dynamic calibration monitor and feedback regu

1990-07-23

1992-09-29

Voeltz, Emanuel T.

Electricity: power supply or regulation systems

Output level responsive

Using a three or more terminal semiconductive device as the...

363 59, 361 18, 250374, G01J 144

Patent

active

051516489

ABSTRACT:
A scintillation tube dynamic calibration monitor that regulates the high voltage power supply to a detector. In a preferred embodiment, a voltage boost current source provides an input voltage for a power out voltage regulator and for a +14.75 volt board regulator. The board regulator provides a voltage reference for various circuitry, and provides a voltage reference for coarse calibration and display calibration adjustment circuitry. The power voltage regulator provides the high voltage power supply drive signal. An error amplifier drives an integrator, which, in turn, drives a bargraph display. An optically-isolated output circuit drives an external alarm or relay. In an alternative embodiment, the pulse width of a detected circuit is linearized and converted to an analog control signal. The analog control signal drives conventional power supply control circuitry.

REFERENCES:
patent: 3795802 (1974-03-01), Powell
patent: 3809998 (1974-05-01), Mansson
patent: 4189017 (1980-02-01), Strobel et al.
patent: 4269201 (1981-05-01), Powell et al.
patent: 4538066 (1985-08-01), Carle et al.
patent: 5023456 (1991-06-01), Claussen
"Op Amp Extends Power-supply Regulation", EDN Magazine, Oct. 31, 1984, p. 210.

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