公开(公告)号：US20150116045A1

公开(公告)日：2015-04-30

申请号：US14527123

申请日：2014-10-29

Applicant: Seiko Epson Corporation

Inventor： Yosuke ITASAKA ,  Masayuki ISHIKAWA ,  Takehiro YAMAMATO ,  Akihiro FUKUZAWA

IPC: H03B5/02 ,  H03B5/32

CPC classification number: H03B5/366 ,  H03B5/04 ,  H03B5/1203 ,  H03B5/1231 ,  H03B5/124 ,  H03B5/362 ,  H03B5/368 ,  Y10T29/42

Abstract: An oscillation circuit includes a terminal XO, a terminal XI, an oscillation unit, and a voltage generation circuit that generates a first voltage and a second voltage. The oscillation unit includes a variable capacitive element connected to the terminal XO or the terminal XI. In a first mode, a signal having a first amplitude is applied between the terminal XO and the terminal XI, and a first voltage is applied to the other end of the variable capacitive element. In a second mode, a signal having a second amplitude larger than an amplitude of the signal having the first amplitude is applied between the terminal XO and the terminal XI, a second voltage is applied to the other end of the variable capacitive element, and a voltage applied to the both ends of the variable capacitive element is lower than the maximum rated voltage of the variable capacitive element.

Abstract translation: 振荡电路包括端子XO，端子XI，振荡单元和产生第一电压和第二电压的电压产生电路。 振荡单元包括连接到端子XO或端子XI的可变电容元件。 在第一模式中，具有第一幅度的信号施加在端子XO和端子XI之间，并且第一电压被施加到可变电容元件的另一端。 在第二模式中，在端子XO和端子XI之间施加具有比具有第一幅度的信号的振幅大的第二振幅的信号，向可变电容元件的另一端施加第二电压， 施加到可变电容元件的两端的电压低于可变电容元件的最大额定电压。