OSCILLATOR - HUAWEI TECH CO LTD

Title:

OSCILLATOR

Document Type and Number:

WIPO Patent Application WO/2018/010180

Kind Code:

A1

Abstract:

An oscillator for providing a low phase noise comprises a resonance unit (10), a cross-coupled current source unit (30), and a positive feedback unit (20) coupled between the current source unit (30) and the resonance unit (10). The resonance unit (10) is configured to generate a differential oscillation signal having a first oscillation frequency. The positive feed unit (20) is configured to receive the differential oscillation signal and apply a gain to the differential oscillation signal to obtain a differential output oscillation signal. The current source unit (30) is configured to provide an adjustable bias current for the resonance unit (10) and the positive feedback unit (20). Since the current source unit (30) provides the adjustable bias current for the positive feedback unit (20) and the resonance unit (10), and the current source unit (30) and the positive feedback unit (20) form a gm-boosted structure, the positive feedback unit (20) can apply gain to the received differential oscillation signal to obtain the differential output oscillation signal. Therefore, power consumption of the oscillator is reduced by reducing the bias current while also ensuring the normal start of the oscillator.

More Like This:

WO/2013/137867

TEMPERATURE COMPENSATION FOR OSCILLATOR

Inventors:

SHI KAI (CN)
LU LEI (CN)
XIE LEI (CN)

Application Number:

PCT/CN2016/090223

Publication Date:

January 18, 2018

Filing Date:

July 15, 2016

Export Citation:

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Assignee:

HUAWEI TECH CO LTD (CN)

International Classes:

H03B5/12; H03B7/06

Foreign References:

CN104242924A	2014-12-24
CN101834561A	2010-09-15
CN102118162A	2011-07-06
CN104270100A	2015-01-07
CN102904527A	2013-01-30
CN101295962A	2008-10-29
US20090134944A1	2009-05-28
US20160036382A1	2016-02-04

Other References: