An amplifier includes a first stage and a second stage. The first stage includes a first output and a second output. The second stage includes an output, a first transistor and a second transistor. The first transistor includes a drain coupled to the first output of the first stage, and a source coupled to the output of the second stage. The second transistor includes a drain coupled to the second output of the first stage, and a gate coupled to the output of the second stage.

An amplifier includes a first stage and a second stage. The first stage includes a first output and a second output. The second stage includes an output, a first transistor and a second transistor. The first transistor includes a drain coupled to the first output of the first stage, and a source coupled to the output of the second stage. The second transistor includes a drain coupled to the second output of the first stage, and a gate coupled to the output of the second stage.

Amplifier devices includes a first amplifier connected to receive an input voltage. The first amplifier outputs an internal voltage. These structures also include a second amplifier having an input node connected to receive the internal voltage and an output node outputting an output voltage. A resistive feedback loop is connected to the input node and the output node of the second amplifier. A first cross-coupled bandwidth boosting stage is connected to the input node of the second amplifier and a second cross-coupled bandwidth boosting stage connected to the output node of the second amplifier. The cross-coupled bandwidth boosting stages form a distributed differential positive feedback structure.

Amplifier devices includes a first amplifier connected to receive an input voltage. The first amplifier outputs an internal voltage. These structures also include a second amplifier having an input node connected to receive the internal voltage and an output node outputting an output voltage. A resistive feedback loop is connected to the input node and the output node of the second amplifier. A first cross-coupled bandwidth boosting stage is connected to the input node of the second amplifier and a second cross-coupled bandwidth boosting stage connected to the output node of the second amplifier. The cross-coupled bandwidth boosting stages form a distributed differential positive feedback structure.

An amplifier includes a first stage and a second stage. The first stage includes a first output, and a second output. The second stage includes a first transistor, a second transistor, and a common-mode circuit. The first transistor includes a drain coupled to the first output of the first stage. The second transistor includes a drain coupled to the second output of the first stage. The common-mode circuit includes a reversible current mirror circuit coupled to the drain of the first transistor and the drain of the second transistor.

The present invention discloses a signal output circuit applying bandwidth broadening mechanism for an image signal transmission apparatus that includes a first driving circuit and a second driving circuit. The first driving circuit includes a continuous time linear equalizer (CTLE) and is configured to receive a digital input signal to perform a high frequency enhancement thereon to increase a bandwidth of the digital input signal to generate a first output signal, in which a zero point and two poles of a frequency response of the first driving circuit are determined by circuit parameters thereof. The second driving circuit is configured to receive and amplify the first output signal to generate a second output signal for an image receiving apparatus.

An operational amplifier includes a differential amplifier circuit and a common mode feedback circuit. The differential amplifier circuit includes a bias circuit, an amplifier circuit, and a load circuit. The bias circuit generates a first operation voltage. The amplifier circuit receives a pair of input signals, and generates a pair of output signals according to the input signals and the first operation voltage. The load circuit is coupled to the amplifier circuit. The common mode feedback circuit generates at least one common mode feedback voltage based on a common mode voltage and a reference voltage. The common mode voltage is associated with the output signals. The at least one common mode feedback voltage is for controlling the bias circuit and the load circuit, to control a direct current (DC) voltage level of the differential amplifier circuit.

An operational amplifier includes a differential amplifier circuit and a common mode feedback circuit. The differential amplifier circuit includes a bias circuit, an amplifier circuit, and a load circuit. The bias circuit generates a first operation voltage. The amplifier circuit receives a pair of input signals, and generates a pair of output signals according to the input signals and the first operation voltage. The load circuit is coupled to the amplifier circuit. The common mode feedback circuit generates at least one common mode feedback voltage based on a common mode voltage and a reference voltage. The common mode voltage is associated with the output signals. The at least one common mode feedback voltage is for controlling the bias circuit and the load circuit, to control a direct current (DC) voltage level of the differential amplifier circuit.

A Josephson parametric device is presented, which includes an input port, an output port, and a signal path between the input port and the output port. The signal path includes a first section coupled to the input port and having a first passband, a second section coupled to the output port and having a second passband and a Josephson junction coupling element for parametric coupling between the first and second section. The Josephson junction coupling element is coupled to and interposed between the first section and the second section. The Josephson junction coupling element is configured such that, in response to the input port receiving a first signal at a first frequency lying within the first passband and the Josephson junction coupling element receiving a pump tone, the Josephson junction coupling element converts the first signal into a second signal with a second frequency lying within the second passband.

A negative feedback inductor and a gate inductor are formed in different wiring layers of a substrate so as to be at least partially overlapped with each other in a plan view. When the lower wiring layer is thinner and the upper wiring layer is thicker, the negative feedback inductor Lc is formed in the lower wiring layer that is thinner.