Abstract: Provided are a vibration object monitoring method and apparatus, a computer device, and a storage medium. The method includes: in response to detecting that a vibration object exists in a monitoring video picture for a target monitoring region, a vibration object region in the monitoring video picture is determined, where the vibration object region is a region where the vibration object is located in the monitoring video picture; displacement information of a key point of the vibration object in the vibration object region is recorded; vibration information of the vibration object in the monitoring video picture is determined based on the displacement information; and a vibration object monitoring result for the target monitoring region is generated according to the vibration information. The abnormal vibration monitoring can be performed on the vibration object in the target monitoring region in time according to this method.

Abstract: An amplifier circuit is disclosed comprising: an input terminal configured to receive a radio frequency input signal; an output terminal configured to provide a radio frequency output signal; a first transistor having a first collector, a first emitter, and a first base; a second transistor having a second collector, a second emitter, and a second base; a bypass switch; and a controller. The first base is connected to the input terminal and the second emitter. The first collector is connected to a circuit voltage supply and the output terminal. The first emitter is connected to ground and to the second base. The second collector is connected to a collector voltage supply. The bypass switch is connected between the first base and the output terminal.

Abstract: An amplifier circuit is disclosed comprising: an input terminal configured to receive a radio frequency input signal; an output terminal configured to provide a radio frequency output signal; a first transistor having a first collector, a first emitter, and a first base; a second transistor having a second collector, a second emitter, and a second base; a bypass switch; and a controller. The first base is connected to the input terminal and the second emitter. The first collector is connected to a circuit voltage supply and the output terminal The first emitter is connected to ground and to the second base. The second collector is connected to a collector voltage supply. The bypass switch is connected between the first base and the output terminal.

Abstract: A voltage controlled oscillator (VCO) is provided that includes an output buffer having a first buffer stage including a first transistor and a second buffer stage including a second transistor. The first and second transistors are connected in a cascaded emitter follower buffer arrangement.

Abstract: A frequency multiplier is provided that includes a switching component having a plurality of differential pairs of transistors. The frequency multiplier further includes a gain stage. A common mode feedback generated by the switching component is also provided to the gain stage.

Abstract: A tunable transformer providing switched inductance includes a primary winding and a secondary winding. A switch is connected to the secondary winding of the transformer. At least one capacitor is also connected to the secondary winding of the transformer with the switch.

Abstract: A frequency multiplier is provided that includes a switching component having a plurality of differential pairs of transistors. The frequency multiplier further includes a gain stage. A common mode feedback generated by the switching component is also provided to the gain stage.

Abstract: A voltage controlled oscillator (VCO) is provided that includes an output buffer having a first buffer stage including a first transistor and a second buffer stage including a second transistor. The first and second transistors are connected in a cascaded emitter follower buffer arrangement.