Analog divider
AssigneeRF Micro Devices, Inc.
InventorsPraveen Varma Nadimpalli, Joseph Hubert Colles
Life of this patent
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Abstract
An exemplary embodiment of an analog multiplier may include a voltage controlled resistance circuit, a first transistor and a second transistor, where the resistance of the voltage controlled resistance circuit is based upon a difference between a supply voltage and a first input voltage and a constant current supply. The current passing through the voltage controlled resistance circuit is based upon a difference between the voltage supply and a second input voltage. The first transistor may be configured to mirror the current passing through the voltage controlled resistance circuit.
Claims16
A method to provide an analog multiplier comprising:
- generating a reference current, wherein the reference current passes through a first element;
- controlling a first voltage generated across the first element to set a resistance of the first element based upon a first input voltage, wherein the resistance of the first element includes a drain-to-source resistance of a first transistor and a resistance of a first resistor;
- controlling a resistance of a second element to be substantially proportional to the resistance of the first element, wherein the resistance of the second element includes a drain-to-source resistance of a second transistor and a resistance of a second resistor;
- and
- controlling a second voltage generated across the second element to generate a current passing through a third element based upon a second input voltage.
Dependencies are inferred from the claim text.