Vorrichtung und Verfahren zum Anwenden der Frequenzkalibrierung auf ein Lokales Oszillatorsignal, das von einem Referenztaktausgang eines Aktiven Oszillators Abgeleitet Wird, der Keinen Elektromechanischen Resonator Aufweist

Details

Veröffentlichungs-Nr.

EP3514954

Aktenzeichen

EP18205779

Anmeldetag

12. November 2018

Veröffentlichung

30. Juni 2021

Erteilung

30. Juni 2021

Rechtsraum

EP

IPC

H03J7/04H03J7/06H03L7/183

Abstract

A wireless system includes a local oscillator (LO) signal generation circuit, a receiver (RX) circuit, and a calibration circuit. The LO signal generation circuit generates an LO signal according to a reference clock. The LO signal generation circuit includes an active oscillator. The active oscillator generates the reference clock, wherein the active oscillator includes at least one active component, and does not include an electromechanical resonator. The RX circuit generates a down-converted RX signal by performing down-conversion upon an RX input signal according to the LO signal. The calibration circuit generates a frequency calibration control output according to a signal characteristic of the down-converted RX signal, and outputs the frequency calibration control output to the LO signal generation circuit. The LO signal generation circuit adjusts an LO frequency of the LO signal in response to the frequency calibration control output.

Anmelder

Firma

MEDIATEK INC.

Land

🇹🇼 Taiwan

Fachgebiete