Limiting amplifier in high-speed VCSEL driver

• Main Authors: LI JINGHU, CHEN FUJIE, WU YANGJI, CHEN QIBIN
• Format: Patent
• Language: Chinese; English
• Published: 02.07.2024
• Subjects: AMPLIFIERS; BASIC ELECTRONIC CIRCUITRY; CONTROL OF AMPLIFICATION; ELECTRICITY

The invention provides a limiting amplifier in a high-speed VCSEL (Vertical Cavity Surface Emitting Laser) driver, which is characterized by comprising a constant current source, an MOS (Metal Oxide Semiconductor) tube M1, an MOS tube M2, an MOS tube M3, an MOS tube M4, a capacitor CL and a resistor R, the constant current source is connected with the source electrode of the MOS tube M3 and the source electrode of the MOS tube M4 at the same time; the first end of the resistor R is connected with the grid electrode of the MOS tube M1, and the second end of the resistor R is simultaneously connected with the drain electrode of the MOS tube M1, the drain electrode of the MOS tube M3 and the grid electrode of the MOS tube M2; the drain electrode of the MOS tube M2 is connected with one end of the capacitor CL, the drain electrode of the MOS tube M4 and the output end at the same time; the grid electrode of the MOS tube M3 is connected with the positive electrode of the input end; the grid electrode of the MOS tu