Abstract: A circuit (200) for testing failure of a connection between a radio frequency, RF, integrated circuit (201) and external circuitry (204), the circuit comprising: an amplifier (205) having first and second input paths (215, 216) and first and second output paths (206, 207); a first power detector (208, 209) coupled to one of said first or second output paths; at least one connection (211) between said first and second output paths (206, 207) and said external circuitry (204), connecting said outputs to a RF combiner (210) said external circuitry; at least one disabling circuit (230, 232, 234, 236, 240, 242, 260, 262) coupled to at least one of said first and second output paths (206, 207) or at least one of said first and second input path (215, 216), before said path reaches said power detector (208, 209); for disabling one of said inputs or outputs; wherein when said input or output path is disabled (206, 207), and a signal is output along the enabled output path (206, 207), the power detector (208, 209) on

Abstract: 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.

Abstract: 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.

Abstract: 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 analogue signal to provide a phase shifted signal, switching circuitry and a controller arranged to provide the analogue signal to the mixer stage as a voltage in the first mode of operation and as a current in the second mode of operation.

Abstract: 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 analogue signal to provide a phase shifted signal, switching circuitry and a controller arranged to provide the analogue signal to the mixer stage as a voltage in the first mode of operation and as a current in the second mode of operation.

Abstract: An electronic circuit includes several (at least two) oscillating and/or resonant devices. The circuit uses a measuring device to measure the phase noise of one of the two oscillating/resonant devices. This measuring device is integrated on a chip on which the oscillating/resonant device to be measured is also integrated. The circuits and methods described find application in the area of radiofrequency/high frequency electronics RF/HF, in particular adapted to general public applications in mobile communication systems and/or to metrology.

Abstract: An electronic circuit includes several (at least two) oscillating and/or resonant devices. The circuit uses a measuring device to measure the phase noise of one of the two oscillating/resonant devices. This measuring device is integrated on a chip on which said oscillating/resonant device to be measured is also integrated. The circuits and methods described find application in the area of radiofrequency/high frequency electronics RF/HF, in particular adapted to general public applications in mobile communication systems and/or to metrology.