High linearly WiGig baseband amplifier with channel select filter
AssigneeTensorcom, Inc.
InventorsZaw Soe, Kevin Jing, Steve Gao
Life of this patent
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Abstract
A circuit comprises a Sallen-Key filter, which includes a source follower that implements a unity-gain amplifier; and a programmable-gain amplifier coupled to the Sallen-Key filter. The circuit enables programmable gain via adjustment to a current mirror copying ratio in the programmable-gain amplifier, which decouples the bandwidth of the circuit from its gain settings. The programmable-gain amplifier can comprise a differential voltage-to-current converter, a current mirror pair, and programmable output gain stages. The Sallen-Key filter and at least one branch in the programmable-gain amplifier can comprise transistors arranged in identical circuit configurations.
Claims20
A WiGig baseband signal-processing circuit comprising:
- a Sallen-Key filter comprising a source follower that implements a unity-gain amplifier;
- and
- a programmable-gain amplifier coupled to the Sallen-Key filter, the circuit configured to provide programmable gain via adjustment to a current mirror copying ratio in the programmable-gain amplifier to decouple bandwidth of the circuit from its gain settings.
A method for manufacturing a baseband signal-processing circuit, comprising:
- employing a source follower in a Sallen-Key filter to provide unity gain;
- and
- coupling a programmable-gain amplifier to the Sallen-Key filter to provide programmable gain via adjustment to a current mirror copying ratio in the programmable-gain amplifier, thereby decoupling bandwidth of the circuit from its gain settings.
A method of operating a circuit, comprising:
- controlling bandwidth of the circuit via a Sallen-Key filter comprising a source follower that implements a unity-gain amplifier;
- and
- controlling gain of the circuit via adjustment to a current mirror copying ratio in a programmable-gain amplifier coupled to the Sallen-Key filter, wherein the bandwidth of the circuit is decoupled from its gain settings.
Dependencies are inferred from the claim text.