Circuits for field-programmable receiver front ends
AssigneeThe Trustees of Columbia University in the City of New York
InventorsJianxun Zhu, Peter R. Kinget
Life of this patent
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Abstract
Circuits for field-programmable receiver front ends are provided. These front ends can include a field programmable common source low noise transconductance amplifier (LNTA), a field programmable common gate LNTA, first and second four-phase I/Q mixers, first, second, third, and fourth transimpedance amplifiers, an I-path complex combiner, and a Q-path complex combiner. Transconductance cells in each of the field programmable common source LNTA and field programmable common gate LNTA can be programmed to operate in one of a class-AB mode, a class-C mode, and an OFF mode.
Claims13
A circuit for a field-programmable noise cancelling wideband receiver front end, the circuit comprising:
- a field programmable common source low noise transconductance amplifier (LNTA) having an input coupled to an input signal and producing a first output;
- a field programmable common gate LNTA having an input coupled to the input signal and producing a second output;
- a first four-phase I/Q mixer having an input coupled to the first output and producing first differential I outputs and first differential Q outputs;
- a second four-phase I/Q mixer having an input coupled to the second output and producing second differential I outputs and second differential Q outputs;
- a first transimpedance amplifier (TIA) having inputs coupled to the first differential I outputs and producing first differential TIA outputs;
- a second TIA having inputs coupled to the first differential Q outputs and producing second differential TIA outputs;
- a third TIA having inputs coupled to the second differential I outputs and producing third differential TIA outputs;
- a fourth TIA having inputs coupled to the second differential Q outputs and producing fourth differential TIA outputs;
- an I-path complex combiner that combines the first differential TIA outputs, the second differential TIA outputs, the third differential TIA outputs, and the fourth differential TIA outputs and that produces combiner I-path outputs;
- and
- a Q-path complex combiner that combines the first differential TIA outputs, the second differential TIA outputs, the third differential TIA outputs, and the fourth differential TIA outputs and that produces combiner Q-path outputs.
Dependencies are inferred from the claim text.