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Clipper Circuit and contro method, Charging circuit, electronic equipment and timing counter

A technology of a clipping circuit and a controller, which is applied to circuit devices, electronic timers, battery circuit devices, etc., can solve problems such as reduced charging efficiency

Inactive Publication Date: 2004-01-28
SEIKO EPSON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0027] For this reason, especially in the case of a short charging time, the amount of discharge due to the through current is equal to or greater than the amount of charge obtained during charging, resulting in a serious decrease in charging efficiency

Method used

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  • Clipper Circuit and contro method, Charging circuit, electronic equipment and timing counter
  • Clipper Circuit and contro method, Charging circuit, electronic equipment and timing counter
  • Clipper Circuit and contro method, Charging circuit, electronic equipment and timing counter

Examples

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Embodiment Construction

[0117] A wristwatch employing a clipping type charging circuit is described below as an embodiment of the present invention.

[0118] FIG. 1 is a circuit diagram of a clipping type charging circuit used in a wrist watch according to the present invention. In this clipping type charging circuit 10, in addition to the through current prevention circuit 20 replacing image 3 Except for the circuit 3, its configuration is almost the same as that of the previous clipping type charging circuit 1, and the corresponding components are marked with the same reference numerals, and a detailed description of these components is not given.

[0119] The clipping type charging circuit 10 is composed of an oscillator circuit 2A that outputs a clock signal, comparators COM1 and COM2 (comparators for detecting electromotive force) that compare the voltage on the output terminals A and B with the terminal voltage VDD, turn on It consists of turning on / off the P-channel FET P1 (charging switch) ...

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Abstract

A controller for through current prevention circuit controlling two N-channel FETs sets a shorted period based on a clock signal and, when two P-channel FETs are off during the shorted period, sets the N-channel FETs to on, and when chattering occurs in the P-channel FETs forcibly sets the two N-channel FETs to the off state for a given amount of time.

Description

technical field [0001] The invention relates to a clipping circuit, a control method of the clipping circuit, a clipping type charging circuit, electronic equipment and a timing device. Background technique [0002] A clipping type charging circuit is known as a circuit that charges a capacitor or a battery with the power of an alternating current generated by a generator. [0003] Attached Figure 12 It is the circuit diagram of the clipping type charging circuit. The clipping type charging circuit 1 is composed of an oscillator circuit 2, comparators COM1 and COM2, and an AND circuit 3, wherein the oscillator circuit 2 outputs a clock signal CL, and the comparators are respectively connected to the output terminals A and B of the alternator AG. The voltage of the power supply is compared with the terminal voltage VDD of the power supply, and the circuit 3 calculates the logical product of the output signals SP1, SP2 of the comparators COM1 and COM2 and the clock signal CL...

Claims

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Application Information

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IPC IPC(8): G04G19/00G04C10/00H02J7/02H02M7/12H02M7/21H02M7/219
CPCH02M7/219H02M1/38
Inventor 新川修
Owner SEIKO EPSON CORP
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