Low power voltage transimpedance amplifier
By introducing a high-pass filter into the transconductance-transimpedance amplifier circuit, the problem of insufficient margin under low supply voltage is solved, realizing a transconductance-transimpedance amplifier circuit design with greater margin and robustness, which is suitable for linear equalizers.
CN122419397APending Publication Date: 2026-07-17MEDIATEK INC
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Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- MEDIATEK INC
- Filing Date
- 2025-12-24
- Publication Date
- 2026-07-17
AI Technical Summary
Technical Problem
Traditional transconductance-transimpedance amplifier circuits face the problem of insufficient margin at low supply voltages, resulting in reduced output swing, decreased gain, and nonlinear distortion.
Method used
Introducing a high-pass filter into the transimpedance amplifier stage, formed by adding capacitors and resistors at the gate electrode of the transistor, increases the circuit margin, enabling it to operate normally under low supply voltage.
Benefits of technology
It improves the operating margin of the transconductance-transimpedance amplifier circuit under low supply voltage, enhances the circuit's robustness and frequency response characteristics, and is suitable for linear equalizer applications.
✦ Generated by Eureka AI based on patent content.
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Abstract
本发明提供了一种电路，包含一个跨阻放大器级。该跨阻放大器级配置为接收电流信号以生成输出电压信号，其中该跨阻放大器级包括一个第一晶体管、一个第二晶体管和一个高通滤波器。第一晶体管具有栅极电极、第一电极和第二电极，其中栅极电极耦合到电流信号，并且第一电极耦合到电源电压。第二晶体管具有栅极电极、第一电极和第二电极，其中该第二晶体管的第一电极耦合到该第一晶体管的第二电极，并且该第二晶体管的第二电极耦合到地电压。高通滤波器配置为滤波该电流信号以生成滤波后的电流信号到该第二晶体管的栅极电极。
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