SLOPE CONTROL CIRCUIT

摘要

A slope control circuit is connected between a replica circuit and a controller area network bus. The replica circuit generates an upper and a lower feedback signal. The slope control circuit receives and is driven by the feedback signals for controlling a voltage slope of a high-level output and a low-level output. The slope control circuit comprises an upper and a lower driving circuit, individually connected between the replica circuit, the high-level output and the low-level output. The upper driving circuit and the lower driving circuit respectively include at least one charging and discharging circuit. By controlling the charging and discharging circuit, the present invention controls decreasing voltage slope of the high-level output to be symmetric to increasing voltage slope of the low-level output, and delay time of the circuit switching between different operating modes to be equivalent.

主权项

1. A slope control circuit, electrically connected between a replica circuit and a controller area network bus, wherein said replica circuit generates an upper feedback signal and a lower feedback signal, and said slope control circuit receives and is driven by said upper feedback signal and said lower feedback signal so as to control a voltage slope of a high-level output and a low-level output of said controller area network bus, said slope control circuit comprising:
an upper driving circuit, connected between said replica circuit and said high-level output and comprising at least one first charging and discharging circuit, in which said first charging and discharging circuit is controlled in association with a decreasing voltage slope of said high-level output; and a lower driving circuit, connected between said replica circuit and said low-level output and comprising at least one second charging and discharging circuit, in which said second charging and discharging circuit is controlled in association with a increasing voltage slope of said low-level output such that said decreasing voltage slope of said high-level output and said increasing voltage slope of said low-level output are symmetric.