Stmicroelectronics S.r.l.

Daniele Grasso

Giuseppe Avellone

A differential amplifier includes: first and second input nodes; first and second output nodes; first and second supply nodes; first and second offset compensation nodes; first and second amplifier staged configured to generate first and second output voltages at the first and second output nodes as a function of first and second input voltages of the first and second input nodes and first and second offset compensation voltages of the first and second offset compensation nodes; and a feedback circuit configured to generate the first and second offset compensation voltages as a function of the first and the second output voltages. The feedback circuit includes: a coupling circuit coupled between the first and second offset compensation nodes, wherein the coupling circuit comprises one or more passive electric components.

Differential amplifier, corresponding integrated circuit, system, instrumentation amplifier and method

A receiver is arranged to receive a plurality of Global Navigation Satellite System (GNSS) signals from up to four different satellite navigation systems including a GLONASS system, a BeiDou system, a GPS system, and a Galileo system. Received GNSS signals are mixed with a first local frequency signal to generate a plurality of mixed signals. The mixed signals are processed in up to three parallel branches. In a first branch, a first portion of the mixed signals are transformed by passing the first portion through a band-pass filter having a bandwidth between about 0 MHz and 46 MHz and by amplifying the filtered signals with an AGC circuit. In a second branch, a second portion of the mixed signals are transformed by rejecting image signals of the second portion with an image rejection filter and mixing image rejection filter output signals with a second local frequency signal to derive first remixed signals. In a third branch, a third portion of the mixed signals are transformed by adjusting a phase of the third portion to overlap a band of the first remixed signals. The adjusted third portion of the mixed signals and the first remixed signals are concurrently band pass filtered with a low IF filter.

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Catania, Italy

Daniele Grasso