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Oscillation circuit, electronic apparatus, and moving object

A technology of oscillating circuits and terminals, which is applied in the field of electronic equipment, mobile bodies, and oscillating circuits, and can solve the problems of increased circuit scale and power consumption

Active Publication Date: 2014-04-09
SEIKO EPSON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, in the case of applying the method disclosed in Patent Document 1 to a TCXO, it may result in an increase in circuit scale and power consumption

Method used

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  • Oscillation circuit, electronic apparatus, and moving object
  • Oscillation circuit, electronic apparatus, and moving object
  • Oscillation circuit, electronic apparatus, and moving object

Examples

Experimental program
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no. 2 Embodiment approach

[0111] 2.1. Outline of oscillation circuit

[0112] Figure 11 It is a diagram showing a configuration example of the oscillation circuit 12 of the second embodiment. Unlike the first embodiment, the oscillation circuit 12 of the present embodiment includes the generation of the reference voltage V r0 , V r1 , control voltage V C The voltage generation part 60. Also, for Figure 1 to Figure 10 The same elements are denoted by the same reference numerals and explanations thereof are omitted.

[0113] In the oscillation circuit 12 of the present embodiment, the voltage generation unit 60 can easily adjust the reference voltage V r0 , V r1 . Therefore, it is possible to perform fine adjustment so that the variable sensitivity of the varactor diodes 21A, 21B is stable (a state where the frequency change of the oscillation signal is not biased with respect to the control voltage), that is, exhibits better linearity.

[0114] 2.2. The second comparative example

[0115] Be...

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PUM

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Abstract

This invention relates to an oscillation circuit, an electronic apparatus, and a moving object, which can expand the change range of a capacitor while guaranteeing linearity of a changeable capacitive member and inhibit the increase in the power consumption and the circuit scale. An oscillation circuit is connected to a resonator element (crystal resonator) and oscillates a resonator element to output an oscillation signal. The oscillation circuit includes an amplification element (inverter), and a set of variable capacitive elements having at least two variable capacitive elements, which are connected to an oscillation loop from an output to an input of the amplification element and the capacitance values thereof are controlled with potential differences between reference voltages and a variable control voltage. In each variable capacitive element of a set of variable capacitive elements, the common control voltage is applied to one terminal, and the reference voltage which differs between the variable capacitive elements is input to the other terminal.

Description

technical field [0001] The present invention relates to an oscillation circuit, an electronic device, a mobile body, and the like. Background technique [0002] There is known a method of changing the frequency of an oscillating circuit by applying a voltage to a variable capacitance element arranged in an oscillating circuit to change the capacitance. Oscillators that use voltage to control frequency are usually called VCXO (Voltage Controlled X’tal Oscillator: Voltage Controlled Quartz Oscillator). TCXO (Temperature Compensated X’tal Oscillator: Temperature Compensated Quartz Oscillator) is an oscillator that uses this principle to suppress frequency deviation with respect to temperature. [0003] In a discrete oscillator, a variable capacitance element with a large capacitance change can be selected to form a circuit, but the characteristics of the variable capacitance element that can be used when the oscillation circuit is integrated are limited. That is, this is beca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03B5/32
CPCH03L7/16H03L1/023H03B5/04H03B5/364H03B5/36H03B1/00
Inventor 石川匡亨山本壮洋板坂洋佑
Owner SEIKO EPSON CORP
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