LIN (local Internet) receiver for providing immunity against ISO (interrupted source output) pulse

Abstract

The invention discloses an LIN (local Internet) receiver circuit for providing immunity against ISO (interrupted source output) pulse. The receiver circuit comprises a filter circuit, a first comparator a driving device block; the filter circuit receives input signals and generates filtered signals; the first comparator compares the filtered signals and threshold voltage; the driving device block generates output signals of a receiver; the receiver circuit also comprises an input comparator, a signal regulating circuit and an amplitude limiting circuit; the input comparator detects the low voltage on the input signals, and the signal regulating circuit drives the filtered signals to the specific value so as to shorten the length of the short-time pulse wave form interference at the output part of the first comparator; meanwhile, the amplitude limiting circuit detects and removes the short-time pulse wave form interference so as to generate amplitude limiting device output signals; the amplitude limiting device output signals are received by the driving device block; and the driving device block outputs receiver output signals, wherein the receiver output signals do not contain short-time pulse wave form interference and the delay does not exceed 7.5mu s, thus the immunity against the ISO pulse is provided.

Description

technical field [0001] The present invention relates generally to local area internetwork (LIN) circuits, and more particularly to LIN receivers that provide immunity to interrupt source output (ISO) pulses. Background technique [0002] A Local Area Internet (LIN) typically implements transmitters and receivers for communicating within the network. Receiver circuits are susceptible to interference on the input signal, which can cause erroneous receiver outputs. Specifically, receivers are susceptible to radio frequency (RF) pulses and ISO pulses, resulting in false low states on the receiver output signal. In an attempt to mitigate erroneous receiver outputs, known receiver circuits have been designed to provide immunity to RF pulses based on conformance testing and proper emission regulations. However, these known receiver circuits are still susceptible to ISO pulses. Thus, a need exists for a LIN receiver circuit that produces an output signal that is immune to the eff...

AI Technical Summary

Problems solved by technology

However, these known receiver circuits are still susceptible to ISO pulses

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