Nxp Usa, Inc.

Nxp B.v.

Stephane Damien Thuries

Cristian Pavao Moreira

Gilles Montoriol

Didier Salle

Olivier Vincent Doare

Pierre Pascal Savary

Multi-channel radio frequency (RF) transmitter () and method of calibrating the transmitter are provided. In an embodiment, the method involves applying an intermediate frequency (IF) signal with different compensation values on a first phase rotator () in a first channel transmitter module (TX) of the transmitter, wherein the different compensation values are designed to compensate for a particular phase influencing factor, applying phase codes with the same different compensation values for different phases on a second phase rotator () in a second channel transmitter module (TX), measuring resultant phase errors due to phase errors of the first and second channel transmitter modules for the different compensation values, and based on the resultant phase errors, selecting one of the different compensation values to be used as a calibrated compensation value for the first and second phase rotators in the first and second channel transmitter modules to compensate for the particular phase influencing factor.

Phase rotator calibration of a multichannel radar transmitter

A transceiver includes a transmitter, a frequency synthesizer coupled to the transmitter, a receiver coupled to the frequency synthesizer and a voltage sensor; and a digital controller coupled to the voltage sensor, the receiver, and the transmitter, wherein based on a DC voltage measurement of an IF signal made by the voltage sensor, a relative phase adjustment occurs of a relative phase associated with a local oscillator (LO) port and a radio frequency (RF) port of the receiver.

Leakage cancellation in a radar receiver

An example apparatus () is for use for use with front-end circuitry () to transmit and receive radar wave signals, The apparatus () includes digital phase locked loop (PLL) circuitry () and a control circuit (). The digital PLL circuitry () provides a chirp sequence with frequency modulated continuous wave signals (FMCW), the FMCW signals being chirps containing a start frequency and a stop frequency, representing a selected chirp bandwidth (BW). The digital PLL circuitry () includes the DCO circuit () which frequency resolution is configured and arranged to be tuned relative to the selected chirp BW, the frequency resolution configured in response to a selected level of capacitance. The control circuit () controls the selected level of capacitance used by the DCO circuit () by changing the frequency resolution of the DCO according to the selected chirp BW, wherein different frequency resolutions are used for a first selected chirp BW and for a second selected chirp BW.

Methods and apparatuses for digitally controlled oscillator frequency resolution control

The disclosure relates to a phase shifter having a first mode of operation and a second mode of operation, the phase shifter comprising a mixer stage configured to mix an oscillator signal with an analog signal to provide a phase shifted signal, switching circuitry and a controller arranged to provide the analog signal to the mixer stage as a voltage in the first mode of operation and as a current in the second mode of operation.

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Saubens, France

Stephane Damien Thuries