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Voltage-controlled oscillator voltage compensation circuit

A voltage-controlled oscillator and voltage compensation technology, applied in the field of circuits, can solve problems such as large changes, unstable frequency of the voltage-controlled oscillator, and difficulty in debugging, and achieve the effect of solving large frequency changes

Active Publication Date: 2014-03-26
SHENZHEN ZHENHUA MICROELECTRONICS
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The invention provides a voltage-controlled oscillator voltage compensation circuit, which aims to solve the problems in the prior art that the frequency of the voltage-controlled oscillator is unstable under the influence of temperature, and the change is large, debugging is difficult, and the consistency of device parameters is poor.

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  • Voltage-controlled oscillator voltage compensation circuit

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Embodiment Construction

[0025] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0026] The specific realization of the present invention is described in detail below in conjunction with specific embodiment:

[0027] Such as figure 1 As shown, the voltage-controlled oscillator voltage compensation circuit 200 is connected to the voltage-controlled oscillator 300 and the power supply 100 respectively. The voltage-controlled oscillator 300 includes a working voltage input terminal, a compensation voltage input terminal and a ground terminal. The voltage-controlled oscillator voltage compensation circuit 200 includes:

[0028] The first end is connected to the power supply 100, ...

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Abstract

This invention belongs to the circuit filed and provides a voltage-controlled oscillator voltage complementary circuit. A precise reference work voltage is provided for the voltage controlled oscillator voltage compensation circuit through a precise reference voltage stabilizing diode, resistance of a voltage regulation module is controlled to vary as temperature changes, voltage at a voltage output end of the voltage regulation module is further controlled to vary as temperature changes, a voltage that varies as the temperature varies is output to the voltage controlled oscillator for voltage compensation, so that the voltage controlled oscillator can maintain stable output frequency when the temperature changes. As a result, problems that the voltage controlled oscillator has large changes in frequency when the temperature varies under control of a fixed work voltage, the debugging is difficult, and device parameters are inconsistent are solved.

Description

technical field [0001] The invention belongs to the field of circuits, in particular to a voltage-controlled oscillator voltage compensation circuit. Background technique [0002] Voltage Controlled Oscillators (VCOs) are very common components in wireless and communication systems. At present, monolithic semiconductor VCO integrated circuits based on varactor diodes are very mature and widely used. [0003] However, due to the characteristics of semiconductor materials, the temperature characteristics of monolithic semiconductor VCO integrated circuits are relatively poor. For example, for an oscillator set at 100MHz, when the temperature rises from 25°C to 100°C under the control of a fixed operating voltage, the frequency may drop from 100.00MHz to 98.5MHz, with a change of 1.5%, and the change is nonlinear. For systems with harsh working environments, wide operating temperature ranges, and small frequency changes, designers have to try various methods to compensate, bu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03B5/04
Inventor 李旋球丁晓鸿冯雁军孙元鹏
Owner SHENZHEN ZHENHUA MICROELECTRONICS
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