Voltage generation circuit and writing device

The voltage generating circuit enhances the resolution and range of output voltage adjustment by using a smoothing circuit and resistors to compare and control the output voltage, ensuring stable and reliable power supply to electronic components.

JP2025150449APending Publication Date: 2025-10-09SEIKO EPSON CORP
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Patent Information

Application Number
JP2024051319
Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
Filing Date
2024-03-27
Publication Date
2025-10-09

AI Technical Summary

Technical Problem

Existing power supply circuits have a limited setting range for pulse width modulation signals, resulting in low resolution for adjusting output voltage.

Method used

A voltage generating circuit with a smoothing circuit, resistors, and a voltage control circuit that adjusts the output voltage by comparing it to a predetermined reference voltage, allowing for a wider setting range and higher resolution.

Benefits of technology

The circuit enables precise adjustment of output voltage in smaller steps, improving the reliability of voltage supply to electronic components.

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Abstract

To provide a voltage generation circuit capable of setting an output voltage with high resolution.SOLUTION: A voltage generation circuit comprises: a smoothing circuit for receiving an input of a pulse-width modulated signal and outputting voltage obtained by smoothing the pulse-width modulated signal to a first node; a first resistor connected between an output node and a second node; a second resistor connected between the first node and the second node; a third resistor connected between the second node and a ground node; and a voltage control circuit for generating a second voltage based on a first voltage input to an input node, outputting the second voltage to the output node, and controlling the second voltage so that the voltage of the second node becomes a prescribed voltage.SELECTED DRAWING: Figure 1
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