Circuit for generating strong differential digital signals through common IO port of single-chip microcomputer

Abstract

The invention discloses a circuit for generating strong differential digital signals through a common IO port of a single-chip microcomputer. The circuit comprises a triode Q1, a triode Q2, a triode Q3, a triode Q4, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5 and a resistor R6; after being connected with the resistor R5 in series, a signal input end A is connected with the base electrode of the triode Q4, and the emitting electrode of the triode Q4 is connected with the emitting electrode of the triode Q3 and is grounded; the collector electrode of the triode Q4 is connected with the collector electrode of the triode Q2 and a signal output end A; after being connected with the resistor R6 in series, the signal input end A is connected with the base electrode of the triode Q3; the collector electrode of the triode Q3 is connected with the collector electrode of the triode Q1 and a signal output end B; after being connected with the resistor R4 in series, the signal output end A is connected with the base electrode of the triode Q1; after being connected with the resistor R2 in series, the emitting electrode of the triode Q1 is connected with a volt current condenser (VCC); after being connected with the resistor R3 in series, the single output end B is connected with the base electrode of the triode Q2; after being connected with the resistor R1 in series, the emitting electrode of the triode Q2 is connected with the VCC. Data signals can be remotely transmitted through a common single-chip microcomputer system, and anti-interference performance is good.

Description

technical field [0001] The invention relates to the technical field of battery management circuits, in particular to a circuit for generating strong differential digital signals by using a common IO port of a single-chip microcomputer. Background technique [0002] Ordinary single-chip microcomputers transmit digital signals at TTL level, and ordinary TTL signal transmission has poor interference performance and short communication distance. The anti-interference performance of the differential signal is relatively strong. At present, the 485 communication commonly used in the industry and the CAN communication of the car both use differential signals. The single-chip microcomputer used in the industry usually needs to communicate by connecting an additional dedicated CAN communication or 485 communication chip. higher. Contents of the invention [0003] In order to overcome the shortcomings mentioned in the prior art, the present invention provides a circuit for generati...

AI Technical Summary

Problems solved by technology

[0002] Ordinary single-chip microcomputers transmit digital signals at TTL level, and ordinary TTL signal transmission has poor interference performance and short communication distance

The anti-interference performance of the differential signal is relatively strong. At present, the 485 communication commonly used in the industry and the CAN communication of the car both use differential signals. The single-chip microcomputer used in the industry usually needs to communicate by connecting an additional dedicated CAN communication or 485 communication chip. higher

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