Invention Grant
- Patent Title: Tuning method for current mode relaxation oscillator
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Application No.: US17330180Application Date: 2021-05-25
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Publication No.: US11641189B2Publication Date: 2023-05-02
- Inventor: Hsien-Hung Wu
- Applicant: MACRONIX INTERNATIONAL CO., LTD.
- Applicant Address: TW Hsinchu
- Assignee: MACRONIX INTERNATIONAL CO., LTD.
- Current Assignee: MACRONIX INTERNATIONAL CO., LTD.
- Current Assignee Address: TW Hsinchu
- Agency: Haynes Beffel & Wolfeld LLP
- Agent Andrew L. Dunlap
- Main IPC: H03K3/0231
- IPC: H03K3/0231 ; H01L29/94 ; H03K3/011 ; H03K4/501

Abstract:
A relaxation oscillator includes an adjustable reference circuit generator to produce a reference current which is applied to a charging circuit. The charging circuit is configured to charge a capacitive node as a function of the reference current and a capacitance of an adjustable capacitor that is operably coupled to the capacitive node. A comparator having inputs operatively coupled to a reference voltage node and to the capacitive node, generates a comparator output. A control circuit alternatively enables the charging circuit to charge the capacitive node and to discharge the capacitive node in response to changes in the comparator output. Also, the control circuit outputs and oscillator output signal have an oscillator period as a function of the adjustable capacitance and the adjustable reference current.
Public/Granted literature
- US20210305971A1 TUNING METHOD FOR CURRENT MODE RELAXATION OSCILLATOR Public/Granted day:2021-09-30
Information query
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