发明名称 |
CONTROL CIRCUIT AND METHOD FOR PIEZOELECTRIC TRANSFORMER |
摘要 |
In a piezoelectric transformer control circuit, when a load (2) is disconnected from a piezoelectric transformer (1) and changes to an open state, an output detection voltage (Vdet) becomes higher than a reference voltage (Vref2), and the output from a voltage comparator (10a) goes "Low". When the output of the piezoelectric transformer (1) is short-circuited to GND, the output detection voltage (Vdet) abruptly drops to almost "0" and becomes lower than a reference voltage (Vref3). The output from a voltage comparator (10b) goes "Low". A voltage-controlled oscillation circuit (6) detects the signal "Low" to stop the generation of the oscillation signal to a driving circuit (7) for driving the piezoelectric transformer (1). |
申请公布号 |
WO9854934(A1) |
申请公布日期 |
1998.12.03 |
申请号 |
WO1998JP02231 |
申请日期 |
1998.05.21 |
申请人 |
NIHON CEMENT KABUSHIKI KAISHA;FUJIMURA, TAKESHI;ISHIKAWA, KATSUYUKI;TOYAMA, MASAAKI |
发明人 |
FUJIMURA, TAKESHI;ISHIKAWA, KATSUYUKI;TOYAMA, MASAAKI |
分类号 |
H01L41/107;H01L41/04;H02M11/00;H05B41/285 |
主分类号 |
H01L41/107 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|