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US 4,012,687 AGranted
Driver amplifier for adjustable high voltage power supply
AssigneeE. I. Du Pont de Nemours and Company
InventorElbert P. Carter
Life of this patent
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AssigneeE. I. Du Pont de Nemours and Company
InventorElbert P. Carter
Estimating the term…
An adjustable series regulated high voltage power supply having a high slew rate is capable of providing relatively low output voltages. This capability is provided by the use of a unique coupling circuit between the control voltage amplifier for the supply and the series pass tubes. This coupling circuit provides a high negative voltage offset in order to accommodate the operating characteristics of the high voltage tubes by the use of a differential driver amplifier. The differential amplifier has inverting and non-inverting inputs. A constant bias is applied to the inverting input to establish a constant current through a voltage divider network having a tap coupled to the non-inverting input of the amplifier. The divider is coupled from the plate of the control amplifier to the output circuit of the supply. By selecting the values of the resistors in the voltage divider, the necessary voltage drop is obtained. A common collector amplifier provides bias for the cathodes of the series pass tubes with respect to their grids.
In a high voltage direct current power supply having a source of direct current, high voltage adapted to provide an adjustable output voltage in response to an input control voltage from a source and an output circuit adapted to be connected to a load, an electron flow device, having a flow control electrode, connected in series between said output circuit and said source, and a control amplifier responsive to said control voltage for driving said control electrode, the improvement comprising:
Dependencies are inferred from the claim text.