Invention Grant
- Patent Title: Compensation technique for the nonlinear behavior of digitally-controlled oscillator (DCO) gain
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Application No.: US16106163Application Date: 2018-08-21
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Publication No.: US10659057B2Publication Date: 2020-05-19
- Inventor: Chao Chieh Li , Min-Shueh Yuan , Robert Bogdan Staszewski , Chia-Chun Liao
- Applicant: Taiwan Semiconductor Manufacturing Company Limited
- Applicant Address: TW Hsinchu
- Assignee: Taiwan Semiconductor Manufacturing Company Limited
- Current Assignee: Taiwan Semiconductor Manufacturing Company Limited
- Current Assignee Address: TW Hsinchu
- Agency: Jones Day
- Main IPC: H03L7/08
- IPC: H03L7/08 ; H03L7/093 ; H03L7/099 ; H03B5/12 ; H03B5/04

Abstract:
Systems and methods are provided for hopping a digitally controlled oscillator (DCO) among a plurality of channels, wherein a gain of the DCO KDCO is a nonlinear function of frequency. A first normalized tuning word (NTW) corresponding to a first channel of the plurality of channels is generated. A first normalizing gain multiplier X is generated based on the nonlinear function of frequency, on an estimate of the nonlinear function of frequency, at a first frequency corresponding to the first channel. The first NTW is multiplied by the first X to obtain a first oscillator tuning word (OTW). The first OTW is input to the DCO to cause the DCO to hop to the first channel. A system for hopping among a plurality of channels at a plurality of respective frequencies comprises a phase-locked loop (PLL), a digitally controlled oscillator (DCO), a multiplexer, and an arithmetic module.
Public/Granted literature
- US20190068201A1 Compensation Technique for the Nonlinear Behavior of Digitally-Controlled Oscillator (DCO) Gain Public/Granted day:2019-02-28
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