公开(公告)号：US20160181978A1

公开(公告)日：2016-06-23

申请号：US14576535

申请日：2014-12-19

Applicant: STMICROELECTRONICS INTERNATIONAL N.V.

Inventor： Gauri Mittal ,  Kallol Chatterjee ,  Pallavi Muktesh ,  Nitin Jain ,  Pradeep Kumar Badrathwal

IPC: H03B5/36

CPC classification number: H03B5/364 ,  H03B5/366 ,  H03B2200/0012 ,  H03B2200/0038

Abstract: A circuit includes an oscillator circuit to receive a bias current and generate an oscillating signal at an output node. A current differencing circuit subtracts a current at the output node from a reference current to generate a first current. In addition, a current mirroring circuit mirrors the first current to generate the bias current. An inverter stage is coupled to the output node, and includes an input branch configured to receive the oscillating signal and generate first and second control signals based upon the oscillating signal. At least one amplifying branch receives the first and second control signals and amplifies the first and second control signals. An output branch receives the amplified first and second control signals and generates an amplified version of the oscillating signal based upon the amplified first and second control signals.

Abstract translation: 电路包括用于接收偏置电流并在输出节点产生振荡信号的振荡器电路。 电流差分电路从参考电流中减去输出节点处的电流以产生第一电流。 此外，电流镜像电路反射第一电流以产生偏置电流。 逆变器级耦合到输出节点，并且包括被配置为接收振荡信号并基于振荡信号产生第一和第二控制信号的输入分支。 至少一个放大支路接收第一和第二控制信号并放大第一和第二控制信号。 输出分支接收放大的第一和第二控制信号，并且基于放大的第一和第二控制信号产生振荡信号的放大版本。

公开(公告)号：US09054637B1

公开(公告)日：2015-06-09

申请号：US14152523

申请日：2014-01-10

Applicant: STMicroelectronics International N.V.

Inventor： Gauri Mittal ,  Kallol Chatterjee

IPC: H03B5/36 ,  H03B5/04 ,  H03B5/06

CPC classification number: H03B5/364 ,  H03B5/04 ,  H03B5/06 ,  H03B2200/0012 ,  H03B2200/0038 ,  H03B2200/0066 ,  H03B2200/0094

Abstract: An amplitude limiting circuit for a crystal oscillator circuit includes a current source configured to supply drive current to the crystal oscillator circuit and a current sensing circuit configured to sense operating current in an inverting transistor of the crystal oscillator circuit. The current comparison circuit functions to compare the sensed operating current to at least a reference current and generate an output signal. A current control circuit generates a control signal for controlling operation of the current source in response to the output signal.

Abstract translation: 晶体振荡器电路的振幅限制电路包括被配置为向晶体振荡器电路提供驱动电流的电流源和被配置为感测晶体振荡器电路的反相晶体管中的工作电流的电流感测电路。 当前比较电路用于将感测的工作电流与至少参考电流进行比较，并产生输出信号。 电流控制电路响应于输出信号产生用于控制电流源的操作的控制信号。

公开(公告)号：US09461584B2

公开(公告)日：2016-10-04

申请号：US14576535

申请日：2014-12-19

Applicant: STMicroelectronics International N.V.

Inventor： Gauri Mittal ,  Kallol Chatterjee ,  Pallavi Muktesh ,  Nitin Jain ,  Pradeep Kumar Badrathwal

IPC: H03B5/36

CPC classification number: H03B5/364 ,  H03B5/366 ,  H03B2200/0012 ,  H03B2200/0038

Abstract: A circuit includes an oscillator circuit to receive a bias current and generate an oscillating signal at an output node. A current differencing circuit subtracts a current at the output node from a reference current to generate a first current. In addition, a current mirroring circuit mirrors the first current to generate the bias current. An inverter stage is coupled to the output node, and includes an input branch configured to receive the oscillating signal and generate first and second control signals based upon the oscillating signal. At least one amplifying branch receives the first and second control signals and amplifies the first and second control signals. An output branch receives the amplified first and second control signals and generates an amplified version of the oscillating signal based upon the amplified first and second control signals.

Abstract translation: 电路包括用于接收偏置电流并在输出节点产生振荡信号的振荡器电路。 电流差分电路从参考电流中减去输出节点处的电流以产生第一电流。 此外，电流镜像电路反射第一电流以产生偏置电流。 逆变器级耦合到输出节点，并且包括被配置为接收振荡信号并基于振荡信号产生第一和第二控制信号的输入分支。 至少一个放大支路接收第一和第二控制信号并放大第一和第二控制信号。 输出分支接收放大的第一和第二控制信号，并且基于放大的第一和第二控制信号产生振荡信号的放大版本。