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Timing signal generation device, electronic device, and moving object

一种定时信号、生成装置的技术，应用在测量装置、输出稳定、电气元件等方向，能够解决输出频率变动增大等问题

Inactive Publication Date: 2017-08-18
SEIKO EPSON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In the synchronization signal generation device described in Patent Document 1, there is a problem that when the phase difference between the GPS reference pulse and the internal pulse is large, when the cycle time of the synchronization unit is set to a small value, the output Increased variation in frequency

Method used

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  • Timing signal generation device, electronic device, and moving object
  • Timing signal generation device, electronic device, and moving object
  • Timing signal generation device, electronic device, and moving object

Examples

Experimental program
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Effect test

no. 1 Embodiment approach ＞

[0054] figure 1 It is a diagram showing a schematic configuration of the timing signal generation device according to the first embodiment of the present invention.

[0055] figure 1 The shown timing signal generator 1 is configured to include: a GPS receiver 10 (reference timing signal output unit); a processing unit (CPU) 20; an atomic oscillator 30a (first oscillator); an oven-type quartz oscillator (OCXO : OvenControlled Crystal Oscillator) 30b (second oscillator); temperature sensor 40; and GPS antenna 50.

[0056] In addition, in the timing signal generating device 1, some or all of the constituent elements may be physically separated or integrated. For example, the GPS receiver 10 and the processing unit (CPU) 20 may be realized by independent ICs, or the GPS receiver 10 and the processing unit (CPU) 20 may be realized as a single-chip IC.

[0057] This timing signal generation device 1 receives a satellite signal transmitted from a GPS satellite 2 (an example of a p...

no. 2 Embodiment approach ＞

[0151] Figure 11 It is a flowchart for explaining the operation at the start of synchronization of the first synchronization unit in the timing signal generation device according to the second embodiment of the present invention.

[0152] This embodiment is the same as the above-mentioned first embodiment except that the control of the second synchronization unit at the time of GPS recovery is different.

[0153] In addition, in the following description, regarding the second embodiment, differences from the above-described embodiment will be mainly described, and the description of the same matters will be omitted. In addition, in Figure 11 In , the same reference numerals are assigned to the same structures as those in the above-mentioned embodiment.

[0154] In this embodiment, first, steps S41 and S42 are performed in the same manner as in the first embodiment described above. Thereafter, the time constant adjustment unit 234 reduces the time constant of the loop filter...

no. 3 Embodiment approach ＞

[0159] Figure 12 It is a block diagram for explaining the control system of the 1st synchronization part and the 2nd synchronization part with which the timing signal generator of 3rd Embodiment of this invention is equipped.

[0160] This embodiment is the same as the above-mentioned first embodiment except that the time constant of the second loop filter can be adjusted.

[0161] In addition, in the following description, regarding the third embodiment, differences from the above-described embodiment will be mainly described, and the description of the same matters will be omitted. In addition, in Figure 12 In , the same reference numerals are assigned to the same structures as those in the above-mentioned embodiment.

[0162] The DSP 23A of the present embodiment has: a judging part 231A, which judges according to the receiving state of the GPS receiver 10 and the comparison result of the phase comparator 21a; a first count reset part 232, which resets the count value o...

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Abstract

A timing signal generation device includes a PLL circuit that synchronizes a first clock signal of an atomic oscillator (30a) with a reference timing signal of a GPS receiver (10), a PLL circuit (60a) that synchronizes a second clock signal of an oven-controlled crystal oscillator (30a) with the first clock signal, a first count reset unit (232) that enables resetting of a count value of a divider in the PLL circuit (60a) when an operation of the PLL circuit (60a) is restarted, and a second count reset unit (233) that enables resetting of a count value of a divider in the PLL circuit (60a) when the operation of the PLL circuit (60a) is restarted.

Description

technical field [0001] The present invention relates to a timing signal generating device, electronic equipment, and a mobile body. Background technique [0002] For example, there is known a timing signal generating device that oscillates an oscillator such as a quartz oscillator or an atomic oscillator in synchronization with an accurate timing signal contained in a satellite signal from a GPS (Global Positioning System: Global Positioning System) satellite, and This generates a high-precision timing signal (for example, refer to Patent Document 1). [0003] In such a timing signal generation device, for example, when the satellite signal cannot be received, the following operation is generally performed: the synchronization process of synchronizing the clock signal of the oscillator with the timing signal contained in the satellite signal is stopped, and the The oscillator oscillates on its own, thereby generating timing signals. While the oscillator is self-oscillating...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G04R40/02G04R20/02H03L7/26
CPCG04R20/02G04R40/02H03L7/26H03L1/027H03L7/099H03L7/23G01S19/37H03B17/00
Inventor 岛田洋行
Owner SEIKO EPSON CORP
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