公开(公告)号：US20160056763A1

公开(公告)日：2016-02-25

申请号：US14464580

申请日：2014-08-20

Applicant: QUALCOMM Incorporated

Inventor： Shitong ZHAO ,  Jingxue LU

IPC: H03B5/24

CPC classification number: H03B5/24 ,  H03K3/0231 ,  H03K3/26 ,  H03K4/00 ,  H03K4/06

Abstract: An RC oscillator includes a first capacitive element and a second capacitive element and a comparator having a first input, a second input, and an output for outputting an oscillating signal. The oscillator further includes an integrator having a first input, a second input coupled to a reference voltage source, and an output coupled to the second input of the comparator. The oscillator further includes a switch circuit configured to provide a voltage of the first capacitive element to the first input of the comparator in a cycle and a voltage of the second capacitive element to the first input of the comparator in a subsequent cycle. The integrator is configured to sample and to hold the voltage of the second capacitive element continuously in the cycle.

Abstract translation: RC振荡器包括第一电容元件和第二电容元件以及具有第一输入，第二输入和用于输出振荡信号的输出的比较器。 振荡器还包括具有第一输入，耦合到参考电压源的第二输入和耦合到比较器的第二输入的输出的积分器。 振荡器还包括开关电路，其被配置为在随后的周期中将第一电容元件的电压以比较器的第一输入和第二电容元件的电压提供给比较器的第一输入。 积分器被配置为在该周期中连续地采样并保持第二电容元件的电压。