- 专利标题: Phase interpolation apparatus, systems, and methods
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申请号: US11649435申请日: 2007-01-04
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公开(公告)号: US20080164928A1公开(公告)日: 2008-07-10
- 发明人: Gregory Jason Rausch
- 申请人: Gregory Jason Rausch
- 专利权人: Micron Technology, Inc.
- 当前专利权人: Micron Technology, Inc.
- 主分类号: H03H11/16
- IPC分类号: H03H11/16 ; H03K5/15
摘要:
A phase interpolator circuit may comprise a multiplexer circuit (MUX) coupled to a plurality of clock signals at MUX inputs and may provide a first clock signal and a second clock signal at MUX outputs that are out of phase with each other, a digital to analog converter circuit (DAC) to convert a digital input to first and second DAC current outputs such that a sum of the first and second DAC output currents comprises a substantially constant current value, a weighted averager circuit coupled to the MUX and the DAC, and a variable capacitive load circuit coupled to the first and second DAC current outputs. The weighted averager circuit may operate to sum weighted first and second clock signals and to output a phase interpolated clock signal, wherein the first clock signal is weighted according to a first DAC output current and the second clock signal is weighted according to a second DAC output current. Other apparatus, systems, and methods are disclosed.
公开/授权文献
- US07443219B2 Phase interpolation apparatus, systems, and methods 公开/授权日:2008-10-28