Invention Grant
US08405376B2 Low noise reference circuit of improving frequency variation of ring oscillator
有权
改善环形振荡器频率变化的低噪声参考电路
- Patent Title: Low noise reference circuit of improving frequency variation of ring oscillator
- Patent Title (中): 改善环形振荡器频率变化的低噪声参考电路
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Application No.: US12625428Application Date: 2009-11-24
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Publication No.: US08405376B2Publication Date: 2013-03-26
- Inventor: In-chul Hwang , Myung-woon Hwang , Je-cheol Moon , Hyun-ha Jo
- Applicant: In-chul Hwang , Myung-woon Hwang , Je-cheol Moon , Hyun-ha Jo
- Applicant Address: KR Gyeonggi-Do
- Assignee: FCI Inc.
- Current Assignee: FCI Inc.
- Current Assignee Address: KR Gyeonggi-Do
- Priority: KR10-2008-0120264 20081201
- Main IPC: G05F3/16
- IPC: G05F3/16
Abstract:
A low noise reference voltage circuit without using an amplifier inside is capable of transforming a current IPTAT in positive proportion to absolute temperature into a voltage VPTAT in positive proportion to absolute temperature, and outputting it to a ring oscillator. The low noise reference voltage circuit improves a degradation of noise performance compared with a conventional band-gap reference voltage circuit and is in characteristic of low noise and higher PSRR.
Public/Granted literature
- US20100134087A1 LOW NOISE REFERENCE CIRCUIT OF IMPROVING FREQUENCY VARIATION OF RING OSCILLATOR Public/Granted day:2010-06-03
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