Voltage-controlled oscillator

A technology of voltage-controlled oscillators and differential inductors, applied in power oscillators, electrical components, etc., can solve problems such as phase noise deterioration, achieve the effects of suppressing magnetic field coupling, solving traction problems, and improving phase noise performance

Pending Publication Date: 2021-11-19
无锡有容微电子有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional structure cannot realize flexible switching between high-performance and low-power modes at the same time. In the process of pursuing high performance, the phase noise often deteriorates.

Method used

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Examples

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Embodiment Construction

[0020] In order to make the above objects, features and advantages of the present invention more comprehensible, specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0021] figure 2 It is a schematic diagram of an embodiment of a voltage-controlled oscillator provided by the present invention. The voltage-controlled oscillator provided in this embodiment includes a first core circuit 10, a second core circuit 20, and a coupled inductance structure 30; wherein, the coupled inductance structure 30 includes a coupled inductance composed of mutually symmetrical differential inductance L1 and differential inductance L2 .

[0022] The differential inductance L1 has a center tap P10, a connection point P11, and a connection point P12 at a first end, and the differential inductance L2 has a center tap P20, a connection point P21, and a connection point P22 at a second end, and the first end Opposite to the ...

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PUM

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Abstract

In the technical scheme provided by the invention, when a switch S1 and a switch S2 are closed, a voltage-controlled oscillator is in a high-performance state, at the moment, the current of a first current source is equal to that of a second current source, and the overall current of the voltage-controlled oscillator is twice that of the first current source or the second current source; when only one of the switch S1 and the switch S2 is closed, the voltage-controlled oscillator is in a low-power-consumption state, only one of the first current source and the second current source is in a normal working state, and the overall current of the voltage-controlled oscillator is equal to the current of the first current source or the second current source. Therefore, the voltage-controlled oscillator can be flexibly configured into a high-performance working mode and a low-power-consumption working mode, and is suitable for multi-standard and multi-mode chips.

Description

technical field [0001] The invention relates to the field of integrated circuit design, in particular to a voltage-controlled oscillator. Background technique [0002] A voltage-controlled oscillator (VCO, voltage-controlled oscillator) refers to an oscillating circuit whose output frequency corresponds to an input control voltage. [0003] The voltage-controlled oscillator is one of the very important basic circuits in the integrated circuit. There are two main ways to implement the circuit, namely the ring voltage-controlled oscillator (Ring VCO) and the inductor-capacitor voltage-controlled oscillator (LC VCO). Oscillators are widely used in clock synchronization circuits in microprocessors; frequency synthesizers in wireless communication transceivers; clock recovery circuits in optical communications and multi-phase sampling circuits. [0004] At present, in the design with high noise requirements, the LC oscillator has become the first choice; the LC oscillator is wid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03B5/08
CPCH03B5/08
Inventor 邬成汤小虎陈晓哲
Owner 无锡有容微电子有限公司
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