发明授权
- 专利标题: Apparatus for synchronization of double data rate signaling
- 专利标题(中): 双数据速率信令同步的装置
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申请号: US09687858申请日: 2000-10-13
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公开(公告)号: US07017070B1公开(公告)日: 2006-03-21
- 发明人: Chak Cheung Edward Ho , Oleg Drapkin , Carl Mizuyabu , Ray Chau , Gordon Caruk
- 申请人: Chak Cheung Edward Ho , Oleg Drapkin , Carl Mizuyabu , Ray Chau , Gordon Caruk
- 申请人地址: BB Christchurch
- 专利权人: ATI International SRL
- 当前专利权人: ATI International SRL
- 当前专利权人地址: BB Christchurch
- 代理机构: Vedder, Price, Kaufman & Kammholz, P.C.
- 主分类号: G06F1/12
- IPC分类号: G06F1/12 ; G06F1/04
摘要:
A signal phase shifting circuit shifts the phase of an input signal, such as a STROBE signal, based on a reference signal, such as a CLOCK signal, to facilitate, for example, receiving of double data rate data. The signal phase shifting circuit includes a reference signal period dividing circuit having a feedback delay matching array operatively coupled to one of a plurality of voltage control delay lines. This signal phase shifting circuit also includes a variable delay circuit that provides a phase shifted output signal, such as a phase shifted STROBE signal, that includes a delay stage in a phase shifted output signal drive buffer coupled to the delay stage, such as a voltage control delay line. The feedback delay matching array includes a plurality of serially coupled buffer stages operatively coupled to compensate for delay variations associated with the phase shifted output signal drive buffer in the variable delay circuit.
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