Invention Grant
US07961040B2 Accuracy on-chip clock generator for multi-clock driven single chip solution
有权
精准片上时钟发生器，用于多时钟驱动单芯片解决方案
- Patent Title: Accuracy on-chip clock generator for multi-clock driven single chip solution
- Patent Title (中): 精准片上时钟发生器，用于多时钟驱动单芯片解决方案
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Application No.: US12196349Application Date: 2008-08-22
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Publication No.: US07961040B2Publication Date: 2011-06-14
- Inventor: Gang Xu
- Applicant: Gang Xu
- Applicant Address: US CA Santa Clara
- Assignee: OmniVision International Holding, Ltd.
- Current Assignee: OmniVision International Holding, Ltd.
- Current Assignee Address: US CA Santa Clara
- Agency: Blakely Sokoloff Taylor & Zafman LLP
- Main IPC: H03D3/24
- IPC: H03D3/24
Abstract:
A mixed-signal chip is described. The mixed-signal chip comprises a first portion of analog circuit and second portion of digital circuit, an on-chip precision oscillator residing on the first analog portion, the precision oscillator has a precision frequency; a first on-chip non-precision tunable oscillator from a first clock domain residing on the first analog portion, the first non-precision tunable oscillator has a first adjustable frequency; a noise detector for detecting a first noise in the first clock domain; a frequency adjusting register for storing a first desired frequency value of the first on-chip non-precision tunable oscillator, wherein the first desired frequency value is determined based on the first detected noise; a control circuit for adjusting the adjustable frequency of the first non-precision tunable oscillator to the first desired frequency value by using the precision frequency of the on-chip precision oscillator as a reference.
Public/Granted literature
- US20100045388A1 Accuracy on-chip clock generator for multi-clock driven single chip solution Public/Granted day:2010-02-25
Information query
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