A Configurable Differential Delay Cell Circuit

A unit circuit and differential delay technology, which is applied in the field of differential delay unit circuit structure, can solve the problems of output frequency adjustment range limitation, large design overhead, no multiplexing ability, etc., and achieve area cost reduction, area reduction, and implementation selectivity Effect
CN102270985AInactive Publication Date: 2011-12-07NAT UNIV OF DEFENSE TECH
5 Cites 3 Cited by

Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
NAT UNIV OF DEFENSE TECH
Publication Date
2011-12-07
Estimated Expiration
Not applicable · inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention discloses a differential delay unit circuit which has a configurable property and is applied to variable-loop voltage-controlled oscillators. Delay units can change signal propagation paths under the control of an input selecting circuit, and the mode based on multiplexing the delay units changes the stage number of the delay units in the loop, so as to form a configurable annular oscillator with the lowest expenditure, provide different types of gains to voltage-controlled oscillators and increase the range of adjustment. The configurable differential delay unit circuit disclosed by the invention comprises an input selecting circuit, an input circuit and a load circuit.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention belongs to the field of integrated circuit design and is applied to the design of voltage-controlled oscillators, in particular to a configurable differential delay unit circuit structure. Background technique

[0002] A voltage-controlled oscillator (Voltage-controlled Oscillator, VCO) is widely used in various integrated circuits. As a kind of voltage-controlled oscillator, the ring voltage-controlled oscillator is favored by designers because of its simple structure, small area cost and easy integration. In a phase-locked loop circuit, the output frequency is usually adjusted by changing the control voltage Vc, and the ratio of the VCO output frequency range to the Vc adjustment range is called the VCO gain. If the VCO gain is high, it is easy to introduce noise in the phase-locked loop; conversely, if the VCO gain is low, it may reduce the frequency range of the phase-locked loop and prolong the locking time. Therefore, PLL noise, f...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More