公开(公告)号：US09281781B2

公开(公告)日：2016-03-08

申请号：US14248658

申请日：2014-04-09

Applicant: RENESAS ELECTRONICS CORPORATION

Inventor： Osamu Ozawa ,  Soshiro Nishioka

IPC: H03B5/36

CPC classification number: H03B5/364 ,  H03B5/366 ,  H03B2200/0082 ,  H03B2200/0094 ,  H03B2201/0266

Abstract: A semiconductor apparatus includes: first and second external terminals that are connected to respective both ends of an piezoelectric vibrator, in which the piezoelectric vibrator is externally disposed; an inverting amplifier that is disposed between the first and second external terminals; a feedback resistance that feeds back an output of the inverting amplifier to an input of the inverting amplifier; a first capacitative element that is disposed between the first external terminal and a reference voltage terminal; a first resistive element that is disposed in series with the first capacitative element; a second capacitative element that is disposed between the second external terminal and the reference voltage terminal; and a second resistive element that is disposed in series with the second capacitative element.

Abstract translation: 半导体装置包括：第一和第二外部端子，其连接到压电振动器的相应的两端，其中压电振动器在外部布置; 反相放大器，设置在第一和第二外部端子之间; 将反相放大器的输出反馈到反相放大器的输入的反馈电阻; 第一电容元件，设置在第一外部端子和参考电压端子之间; 与第一电容元件串联布置的第一电阻元件; 第二电容元件，设置在第二外部端子和参考电压端子之间; 以及与第二电容元件串联布置的第二电阻元件。

公开(公告)号：US12184234B2

公开(公告)日：2024-12-31

申请号：US18342888

申请日：2023-06-28

Applicant: Renesas Electronics Corporation

Inventor： Soshiro Nishioka

IPC: H03B5/36

Abstract: A semiconductor device includes a crystal oscillator circuit, a first noise application circuit, and a second noise application circuit. The first noise application circuit is connected to the crystal oscillator circuit and is configured to drive a crystal resonator by selectively applying initial noises of opposite phases to a first external terminal and a second external terminal. The second noise application circuit applies a second noise to the first external terminal by amplifying a signal at the first external terminal and returning the amplified signal to the first external terminal, thereby driving an oscillation amplifier and a crystal resonator of the crystal oscillator circuit and shortening a start-up time of the crystal oscillator circuit.