发明授权
- 专利标题: PLL-based precision phase shifting at CMOS levels
- 专利标题(中): 基于PLL的精确相移CMOS级别
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申请号: US864247申请日: 1992-04-06
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公开(公告)号: US5230013A公开(公告)日: 1993-07-20
- 发明人: C. Christopher Hanke , Ray D. Sundstrom
- 申请人: C. Christopher Hanke , Ray D. Sundstrom
- 申请人地址: IL Schaumburg
- 专利权人: Motorola, Inc.
- 当前专利权人: Motorola, Inc.
- 当前专利权人地址: IL Schaumburg
- 主分类号: H03K5/15
- IPC分类号: H03K5/15 ; H03L7/18
摘要:
A circuit for generating precise, phase shifted, CMOS level output signals with respect to an input data signal has been provided. The circuit utilizes a phase-locked loop for generating a precise clock signal. This precise clock signal is then utilized to clock a plurality of serially-coupled flip-flops wherein two-times the input data signal is applied to the data input of the first serially-coupled flip-flop. The outputs of the serially-coupled flip-flops are ECL signals which are then translated to CMOS level signals via ECL-CMOS translators. Finally, the output signals of the translators are respectively used to clock divide-by-two configured flip-flops in order to provide the plurality of precise, phase shifted CMOS output signals. The plurality of precise, phase shifted, CMOS output signals have a 50% duty cycle and represent phase shifted versions of the input data signal wherein the minimum time delay between signals is substantially equal to the period of the precise clock signal.
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