Output stage circuit for bus data transmission

• Main Authors: QIU RENLIAN, ZHANG YUWEN, CHEN YAOZHOU
• Format: Patent
• Language: Chinese; English
• Published: 27.04.2021
• Subjects: AMPLIFIERS; BASIC ELECTRIC ELEMENTS; BASIC ELECTRONIC CIRCUITRY; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; SEMICONDUCTOR DEVICES

The invention provides an output stage circuit for bus data transmission. The output stage circuit comprises a high-side switch, a high-side diode structure, a high-side clamping circuit, a low-side switch and a low-side diode structure. An impedance circuit of the bus is coupled between the high-side switch and the low-side switch so as to generate a differential output signal according to a high-side output signal and a low-side output signal generated by the high-side switch and the low-side switch respectively. The high-side N-type region of the high-side diode structure wraps the high-side P-type region, and the low-side N-type region of the low-side diode structure wraps the low-side P-type region. And the high-side clamping circuit is connected with the high-side N-type region in series and is used for clamping the voltage of the high-side N-type region to be not lower than a high-side preset voltage, so that a parasitic PNP bipolar junction transistor formed by the high-side diode structure and the P-