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Clock generating device and clock generating method

A technology of clock and reference clock signal, applied in the direction of cathode ray tube indicator, automatic power control, instrument, etc., can solve the problem of increasing the manufacturing cost of the clock/data recovery circuit 100, etc.

Active Publication Date: 2010-03-17
HIMAX TECH LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In this way, the oscillator 118 is used to generate the reference clock signal F REF The approach of increasing the clock / data recovery circuit 100's manufacturing cost

Method used

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  • Clock generating device and clock generating method
  • Clock generating device and clock generating method
  • Clock generating device and clock generating method

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Embodiment Construction

[0025] Certain terms are used throughout the specification and appended claims to refer to particular elements. Those skilled in the art should understand that hardware manufacturers may use different terms to refer to the same component. This description and the appended claims do not use the difference in name as a way to distinguish components, but use the difference in function of components as a criterion for distinguishing. The "comprising" mentioned throughout the specification and subsequent claims is an open term, so it should be interpreted as "including but not limited to". In addition, the term "coupled" here includes any direct and indirect means of electrical connection. Therefore, if it is described in the text that a first device is coupled to a second device, it means that the first device can be directly electrically connected to the second device. The second device, or indirectly electrically connected to the second device through other devices or connectio...

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Abstract

The invention relates to a clock generating device and a clock generating method. The clock generating device comprises a frequency divider and a clock / data recovery circuit. The frequency divider isprovided with an input end coupled to a transfer interface and is used for generating a reference clock signal according to an input data received from the transfer interface; and the clock / data recovery circuit is provided with a data input end coupled to the transfer interface and a reference clock input end coupled to an input end of the frequency divider, and the clock / data recovery circuit isused for generating an input clock signal according to one of the input data received at the data input end and the reference clock signal received at the reference clock input end.

Description

technical field [0001] The present invention relates to a clock generating device and its related clock generating method, in particular to a clock / data recovery circuit which does not use an oscillator to generate an input reference clock and its related clock generating method. Background technique [0002] Please refer to figure 1 . figure 1 Shown is a schematic diagram of a conventional clock / data recovery circuit (Clock / Data Recovery Circuit, CDR) 100 . The clock / data recovery circuit 100 has a frequency input terminal N FREQ , used to receive a reference clock signal F REF to an output N OSC Generate an output clock signal F OSC , and a data input terminal N data Used to receive an input data D D . The clock / data recovery circuit 100 includes a phase detector 102, a multiplexer 104, a charge pump circuit 106, a low-pass filter 108, a voltage-controlled oscillator (Voltage-controlled Oscillator, VCO) 110, a phase / A frequency detector 112 , a lock detection cir...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03L7/18G09G5/00
Inventor 翁盟智黄国展
Owner HIMAX TECH LTD