Gm-C filter and multi-phase clock circuit

DWPI Title: Semiconductor chip for use in radar receiver, has Gm-C filter that is configured to act as low-pass filter and first operational transconductance amplifier (OTA) in OTAs is biased by output current of second OTA in OTAs
Abstract: Described herein is a power-efficient Gm-C filter, wherein the Gm-C filter includes several operational transconductance amplifiers (OTAs). In an example, at least two of the OTAs share a common bias current. Further, output of one of the OTAs is used to bias another one of the OTAs. Also described herein is a power-efficient clock generator circuit that is configured to output non-overlapping clock signals. The clock generator circuit includes a ring oscillator circuit, which includes several inverter stages. The clock generator circuit is well-suited for controlling operation of switches.
Use: Semiconductor chip for use in radar receiver (claimed).
Advantage: The chip reduces power consumption and increases maximum achievable speed which can be obtained. Since the integrating capacitors are reduced to the parasitic capacitances of circuit, the maximum frequency of operation is increased.
Novelty: The semiconductor chip a Gm-C filter that is configured to act as a low-pass filter. The Gm-C filter has several OTAs. A first OTA in the OTAs is biased by an output current of a second OTA in the OTAs. The Gm-C filter is a sixth order anti-alias filter. The Gm-C filter has a capacitor. The first OTA is electrically coupled to the capacitor and is configured to inject current onto the capacitor to charge the capacitor. A third OTA is electrically coupled to the capacitor and is configured to receive voltage formed at the capacitor. The Gm-C filter is configured to filter an analog signal received at a radar receiver (108).
Filed: 8/18/2015
Application Number: US14828688A
Tech ID: SD 12862.1
This invention was made with Government support under Contract No. DE-NA0003525 awarded by the United States Department of Energy/National Nuclear Security Administration. The Government has certain rights in the invention.
Data from Derwent World Patents Index, provided by Clarivate
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