Patent ID: 9673756
Date: 2017-06-06
CPC Classifications: H03B,H03L

Claim:
1. A phase-locked loop comprising: a phase detector; and a controlled oscillator, wherein the controlled oscillator provides a MEMS-varactor, wherein the control bandwidth of the phase-locked loop is larger than the mechanical resonant frequency of the MEMS-varactor, wherein the mechanical resonant frequency is built by a spring constant of a membrane of the MEMS-varactor as well as an acceleration force and a damping force acting on the membrane of the MEMS-varactor, wherein the MEMS-varactor provides an actuator, wherein a first actuator face of the actuator is embodied on a substrate, wherein a second actuator face of the actuator is embodied on a movable membrane, wherein the first actuator face provides an electrically conducting connection to a first terminal of the controlled oscillator, wherein the second actuator face provides an electrically conducting connection to a second terminal of the controlled oscillator, wherein the movable membrane is a first movable membrane, wherein the MEMS-varactor additionally provides a second movable membrane, wherein the second actuator face is embodied on the first movable membrane and the second movable membrane, wherein the first movable membrane is arranged above an upper side of the substrate, and wherein the second movable membrane is arranged below a lower side facing away from the upper side of the substrate.