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发明授权
CN101190602B 适用于加热芯片的喷墨控制电路及其驱动电压控制电路 有权

适用于加热芯片的喷墨控制电路及其驱动电压控制电路
摘要：
本发明为一种驱动电压控制电路，借助可调控制电压来调整固定驱动电压以相对应输出驱动功率晶体管的输出驱动电压，包含：第一开关晶体管，具有栅极、漏极，及接收固定驱动电压的源极；第二开关晶体管，具有与第一开关晶体管的漏极连接的栅极、与第二电阻器连接的漏极及与接地端连接的源极；第三开关晶体管，具有与第二电阻器及第二开关晶体管的漏极连接的栅极、与第一电阻器连接的漏极，及接收固定驱动电压及与第一开关晶体管的源极连接的源极；第四开关晶体管，具有与接地端连接的源极、与第一电阻器连接的漏极，及接收可调控制电压的栅极。
摘要（英）：

The invention relates to a driving voltage control circuit, which makes use of an adjustable control voltage to adjust a fixed driving voltage so as to correspondingly output an output driving voltage that drives the power transistor. The invention comprises: a first switching transistor with a grid, a drain electrode and a source electrode that receives the fixed driving voltage; a second switching transistor with a grid that is connected with the grain electrode of the first switching transistor, a drain electrode that is connected with a second resistor, and a source electrode that is connected with an earth terminal; a third switching transistor with a grid that is connected with the second resistor and the drain electrode of the second switching transistor, a drain electrode that is connected with a first resistor, a receiving fixed driving voltage, and a source electrode that is connected with the source electrode of the first switching transistor; a fourth switching transistor with a source electrode that is connected with the earth terminal, a drain electrode that is connected with the first resistor, and a grid that receives the adjustable control voltage.

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