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Phase Shift Circuit, Oscillator, Electronic Apparatus, And Moving Object

A phase-shifting circuit and circuit technology, applied in the field of phase-shifting circuits, electronic equipment, moving bodies, and oscillators, can solve the problems of complicated operations, changing coil inductance, and difficulty.

Inactive Publication Date: 2015-10-14
SEIKO EPSON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is not easy to change the inductance of the coil with an external control signal
In addition, as a method of changing the inductance of a coil, there is a method of newly attaching a coil with a different inductance value, but since the steps for newly attaching a coil are added, the work may be complicated

Method used

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  • Phase Shift Circuit, Oscillator, Electronic Apparatus, And Moving Object
  • Phase Shift Circuit, Oscillator, Electronic Apparatus, And Moving Object
  • Phase Shift Circuit, Oscillator, Electronic Apparatus, And Moving Object

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Embodiment Construction

[0063] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The drawings are used for ease of illustration. In addition, the embodiment described below does not unduly limit the content of the present invention described in the claims. In addition, not all of the structures described below are essential components of the present invention.

[0064] 1. Phase shift circuit

[0065] 1-1. First Embodiment

[0066] figure 1 It is a circuit diagram of the phase shift circuit 1 of 1st Embodiment. At least a part of the phase shift circuit 1 can be configured as a semiconductor device.

[0067] The phase shift circuit 1 of the present embodiment includes: a first capacitor circuit 10; a second capacitor circuit 20; an inductance circuit 60; The first terminal 31 , the second terminal 32 and the third terminal 33 electrically connected to the other end (second terminal 62 ) of the inductance circuit 6...

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PUM

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Abstract

A phase shift circuit includes a first capacitance circuit, a second capacitance circuit, an inductance circuit, and a third capacitance circuit having a first terminal electrically connected to one end (first terminal) of the inductance circuit, a second terminal electrically connected to the other end (second terminal) of the inductance circuit, and a third terminal, and one end (first terminal) of the first capacitance circuit, one end (first terminal) of the second capacitance circuit, the first terminal of the third capacitance circuit, and the one end (first terminal) of the inductance circuit are electrically connected to one another.

Description

technical field [0001] The present invention relates to a phase shift circuit, an oscillator, an electronic device, and a moving body. Background technique [0002] Various phase shifting circuits have been developed that shift the phase of a signal. As one example of application of such a phase shift circuit, there is an oscillator using a phase shift circuit (phase shifter). [0003] Patent Document 1 discloses a phase shifter in a SAW (Surface Acoustic Wave) oscillator using two capacitors connected in series on the input terminal side of the SAW resonator and a surface acoustic wave on the SAW resonator. A single inductance connected in parallel between the connection point of two capacitors and the ground. When the phase shift amount of the SAW element changes due to changes in ambient temperature, the capacitance of the capacitor is changed so as to cancel the change in the phase shift amount of the SAW element. , thereby changing the phase and keeping the oscillatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03H7/18H03H9/64
CPCH03H7/20H03B5/02H03B5/26
Inventor 野村昌生
Owner SEIKO EPSON CORP