Multi-phase fractional divider

Patent metadata

Field	Value
Publication number	US-10205459-B2
Application number	US-201213609894-A
Country	US
Kind code	B2
Filing date	Sep 11, 2012
Priority date	Sep 11, 2012
Publication date	Feb 12, 2019
Grant date	Feb 12, 2019

Abstract

Described is an apparatus comprising: a multi-modulus divider; and a phase provider to receive a multiphase periodic signal and operable to rotate phases of the multiphase periodic signal to generate an output which is received by the multi-modulus divider.

First claim

I claim:

1. A system comprising:
a reference clock generator to generate a reference clock signal;
a memory unit; and
a processor coupled to the memory unit, the processor having a frequency synthesizer operable to receive the reference clock signal and to generate a multiphase periodic signal, the frequency synthesizer including:
a multi-modulus divider; and
a digital phase provider to receive the multiphase periodic signal derived from an oscillator of the frequency synthesizer,
wherein the digital phase provider is operable to rotate phases of the multiphase periodic signal to generate an output which is received by the multi-modulus divider,
wherein the digital phase provider operates using a clock signal having periodic pulses with frequency which is same as frequency of the multiphase periodic signal,
wherein the digital phase provider comprises a bidirectional phase selector which includes a shift register, and
wherein the bidirectional phase selector is operable to dynamically change direction of rotation of the phases of the multiphase periodic signal in either forward or backward direction.

2. The system of claim 1 , wherein the digital phase provider is operable to rotate phases of the multiphase periodic signal in forward or backward direction relative to a transition edge of one of the phases of the multiphase periodic signal.

3. The system of claim 1 further comprises a display unit.

4. A fractional divider comprising:
a multi-modulus divider; and
a bi-directional digital phase provider to receive a multiphase periodic signal derived from an oscillator,
wherein the bi-directional digital phase provider is operable to rotate phases of the multiphase periodic signal to generate an output which is received by the multi-modulus divider, and
wherein the bi-directional digital phase provider operates using a clock signal having periodic pulses with frequency which is same as frequency of the multiphase periodic signal.

5. The fractional divider of claim 4 , wherein the bi-directional digital phase provider is operable to rotate phases of the multiphase periodic signal in forward or backward direction relative to a transition edge of one of the phases of the multiphase periodic signal.

6. The fractional divider of claim 4 , wherein the bi-directional digital phase provider comprises:
a multiplexer; and
a bidirectional phase selector coupled to the multiplexer.

Assignees

• Huang Mingwei
• Intel Corp

Inventors

• Huang Mingwei

Classifications

• H03L7/1976 Primary

  using a phase accumulator for controlling the counter or frequency divider · CPC title

• H03L7/0998

  using phase interpolation · CPC title

• H03L7/081

  provided with an additional controlled phase shifter {(H03L7/0998 takes precedence)} · CPC title