Voltage divider and use as bias network for stacked transistors
AssigneeHarris Corporation
InventorJames D. Beasom
Life of this patent
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Abstract
A voltage divider including a plurality of series connected depletion mode field effect transistors having their gates and sources biased to operate in saturation mode for the operating range of the divider, Preferably, the gates and sources are connected together, A series resistor adjusts the value of the divider element. A parallel resistor defines the output resistance of the divider element. The voltage divider may be used as a biasing network for stacked transistors. A buffer may be provided between the voltage divider and the control terminal of the stacked transistors. The voltage divider may be used to bias follower stages and the input stages of an operational amplifier.
Claims15
A voltage divider comprising:
- a plurality of divider elements connected in series between first and second terminals;
- each of said divider elements including a depletion mode field effect transistor operating in the saturation mode.
A voltage divider operable over a predetermined range of voltage comprising a plurality of series connected field effect transistors, each of said field effect transistors operating in its saturation mode for all voltages within said range of voltage.
A voltage divider operable over a pre-determined range of voltage comprising a plurality of series connected field effect transistors, each of said field effect transistors operating in its saturation mode for voltages within said range of voltage and having a constant fraction of the total voltage across said voltage divider occurring across each transistor.
A voltage divider operable over a predetermined range of voltage comprising a plurality of series connected devices in which the current through said series connected devices is independent of the voltage across said series connected devices.
Dependencies are inferred from the claim text.