US 2026/0066848 A1 · OSCILLATOR CIRCUIT

Abstract

An oscillator circuit for a signal transmitter, the oscillator circuit including: a resonant circuit (12) including a resonant inductor (LR) and a resonant capacitor (CR) parallel to the resonant inductor (LR); a driving branch (14) including a pump driver bank (38) connected to the resonant circuit (12); a feedback branch (15) connected to the resonant circuit (12), and an amplitude regulation loop (28) connected to the resonant circuit (12) via the feedback branch (15) and operable to control the pump driver bank (38). The amplitude regulation loop (28) includes: an envelope detector (30) connected to the resonant circuit (12) via the feedback branch (15), a differential amplifier (32) connected to the feedback branch (15) via the envelope detector (30), and an analog to digital converter (ADC) (34) connected to an output of the differential amplifier (32) and operable to control the pump driver bank (38).

Claims23

Dependent claims

An oscillator circuit (10) for a signal transmitter, the oscillator circuit (10) comprising:

a resonant circuit (12) comprising a resonant inductor (LR) and a resonant capacitor (CR) parallel to the resonant inductor (LR),
a driving branch (14) comprising a pump driver bank (38) connected to the resonant circuit (12),
a feedback branch (15) connected to the resonant circuit (12) and
an amplitude regulation loop (28) connected to the resonant circuit (12) via the feedback branch (15) and operable to control the pump driver bank (38), wherein the amplitude regulation loop (28) comprises
an envelope detector (30) connected to the resonant circuit (12) via the feedback branch (15),
a differential amplifier (32) connected to the feedback branch (15) via the envelope detector (30) and
an analog to digital converter ADC (34) connected to an output of the differential amplifier (32) and operable to control the pump driver bank (38).

4 more elements

A method of generating an oscillation of an oscillator circuit (10) comprising a resonant circuit (12), the method comprising the steps of:

sensing a feedback signal from the resonant circuit (12) via a feedback branch (15),
receiving the feedback signal from the feedback branch (15), by a phase extraction circuit (20) and an amplitude regulation loop (28) via a primary feedback divider (16) and a secondary feedback divider (18), respectively,
extracting a phase of the received feedback signal by the phase extraction circuit (20), to generate a clock signal,
detecting an envelope of the received feedback signal by the amplitude regulation loop (28), to generate a drive strength control signal,
providing the clock signal and the drive strength control signal to a pump driver bank (38) of the resonant circuit (12) for synchronous charge injection into the resonant capacitor (CR).

2 more elements

Dependencies are inferred from the claim text.

Oscillator circuit

Life of this patent

Oscillator circuit

Life of this patent

Abstract

Claims23