1results about How to "Simple and symmetrical structure" patented technology

The application relates to a source adjustable resistance circuit for a high-speed differential amplifier, belonging to the technical field of high-speed analog and radio frequency integrated circuits, comprising a high-speed differential amplifier, a degeneration resistance unit and a control unit; the degeneration resistance unit is composed of a first MOS transistor; the source and the drain of the first MOS transistor are respectively connected to two source nodes of a differential pair transistor of the high-speed differential amplifier, serving as source degeneration resistance thereof, and the gate voltage of the first MOS transistor is generated by the control unit; the control unit is used for generating the gate control voltage of the first MOS transistor. The application replaces a large resistance array with a single MOS transistor, greatly reduces the area, greatly reduces the chip cost, significantly reduces the parasitic capacitance of the degeneration node to the ground, and improves the amplifier bandwidth.