Stmicroelectronics S.a.

Claire Tassin

Patrice Garcia

Franck Goussin

A circuit of a system-on-chip for the transmission of an analog signal at a given transmission frequency modulated by a digital input signal coded in a number m of bits, includes 2&#x2212;1 unit cells each having a first block adapted to receive an activation voltage through an associated switch, and a second block with a first input path coupled to an output path of the first block, a second input path receiving a local oscillator signal, and an output path coupled to the output path of the circuit, with the switches each controlled as a function of the value of a bit of the digital input signal, the bit of index j of the digital input signal where j is between 0 and m&#x2212;1, controlling the switches respectively associated with 2unit cells.

Transmission of analog signals in a system-on-chip

A device includes a digital circuit for receiving input signals and Cartesian feedback signals includes a stage for combining the input signals and the feedback signals to generate error signals. The digital circuit is linked via a conversion stage to an analogue circuit suitable for receiving the error signals, and which includes a stage for generating an output signal from the error signals and a stage for generating the feedback signals from the output signal. The digital circuit also includes at least one gain control stage before the combination stage for modifying the gain applied to the input signals.

Growing community of inventors

Grenoble, France

Claire Tassin