Patent ID: 6486461
Filing Date: 2002-11-26
Classification: H01J,H02M,Y02B

Abstract:
A method for regulating a signal level in a power supply for a microchannel plate in a radiation detector, comprising:receiving an input signal at at least one input terminal of a signal multiplier, the signal multiplier having an output terminal and a return terminal; producing an output signal at the output terminal, the output signal provided to the microchannel plate; providing a regulation signal from the output terminal to the return terminal, wherein providing the regulation signal comprises: coupling an error integrator comprising a divider to the output terminal, the divider operable to divide the output signal; coupling a drive to the error integrator; coupling a variable impedance to the drive and to the return terminal of the signal multiplier, the drive operable to adjust the variable impedance; and protecting the variable impedance with a protector circuit, the protector circuit comprising a first zener diode and a second zener diode, the first zener diode oppositely biased with reference to the second zener diode; and regulating a signal level of the output signal with the regulation signal.