Abstract: A transmitter circuit is provided. The transmitter circuit has an input port, a first transmission node, a second transmission node, a third transmission node, and a fourth transmission node and includes a first operational amplifier, a first output stage, a first resistor-capacitor network, a first switch group coupled between the first resistor-capacitor network and the input port, a first impedance matching circuit coupled to the first output stage, the first transmission node, and the second transmission node, a second operational amplifier, a second output stage, a second resistor-capacitor network, a second switch group coupled between the second resistor-capacitor network and the input port, and a second impedance matching circuit coupled to the second output stage, the third transmission node, and the fourth transmission node.

Abstract: An integrated circuit layout and an integrated circuit layout method for a filter are provided. The method includes: determining a structure of a target filter circuit that includes a capacitor and a first optional component; reserving a first circuit region; disposing the first optional component in the first circuit region, and electrically connecting the first optional component, through a plurality of first wires located in a first metal layer, to a plurality of first external nodes that are outside the first circuit region; electrically connecting the plurality of first external nodes to a plurality of second wires located in a second metal layer, respectively, in which the second wires are disposed around the first circuit region; and disposing the capacitor in the first circuit region and above the first optional component.

Abstract: An amplifier circuit includes a continuous-time linear equalizer, an adjustable gain circuit and a filter circuit. The continuous-time linear equalizer includes a first high-pass path, a first low-pass path, a second high-pass path, and a second low-pass path. The first high-pass path is used to increase a gain of a high-frequency part of a first signal source, and the second high-pass path is used to increase a gain of a high-frequency part of a second signal source. The filter circuit is used to amplify and filter the first signal source and the second signal source, and includes a fully-differential operational amplifier, a first filter network, and a second filter network.