Patent ID: 7288982
Filing Date: 2007-10-30
Classification: H03K

Abstract:
1. A signal converting circuit adapted for interconverting RS232 signals with I 2 C signals, the signal converting circuit comprising: a voltage level converter circuit, a first input end of the voltage level circuit connected to an SDA line of an I a power circuit, an input end of the power circuit connected to a request-to-send pin of the RS232 interface and a power supply respectively, and an output end of the power circuit connected to a second input end of the voltage level converter circuit; a signal separation circuit for separating a signal into two separate signals, an input end of the separation circuit connected to a transmitted data pin of the RS232 interface; a signal modifying circuit, a first input end of the signal modifying circuit connected to a first output end of the signal separation circuit, a second input end of the signal modifying circuit connected to the output end of the power circuit, a controlling end of the signal modifying circuit connected to the request-to-send pin of the RS232 interface; and a clamping circuit, a first input end of the clamping circuit connected to a second output end of the signal separation circuit, a second output end of the clamping circuit connected to an output end of the signal modifying circuit, a first output end of the clamping circuit connected to the SDA line of the I