Invention Grant
- Patent Title: Gated tri-state inverter, and low power reduced area phase interpolator system including same, and method of operating same
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Application No.: US17020528Application Date: 2020-09-14
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Publication No.: US11296684B2Publication Date: 2022-04-05
- Inventor: Tsung-Che Lu , Chin-Ming Fu , Chih-Hsien Chang
- Applicant: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY, LTD.
- Applicant Address: TW Hsinchu
- Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY, LTD.
- Current Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY, LTD.
- Current Assignee Address: TW Hsinchu
- Agency: Hauptman Ham, LLP
- Main IPC: H03K5/13
- IPC: H03K5/13 ; H03K5/135 ; H03K5/15 ; H03K5/00

Abstract:
A phase interpolating (PI) system includes: a phase-interpolating (PI) stage configured to receive first and second clock signals and a multi-bit weighting signal, and generate an interpolated clock signal, the PI stage being further configured to avoid a pull-up/pull-down (PUPD) short-circuit situation by using the multi-bit weighting signal and a logical inverse thereof (multi-bit weighting_bar signal); and an amplifying stage configured to receive and amplify the interpolated clock signal, the amplifying stage including a capacitive component; the capacitive component being tunable; and the capacitive component having a Miller effect configuration resulting in a reduced footprint of the amplifying stage.
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