Patent ID: 9509286
Filing Date: 2016-11-29
CPC Classification: H03F,H03H,H03K,H04L

Claim Text:
1. A driving circuit used in a transmission line, comprising: an operational amplifier, configured for receiving a voltage signal to generate an output; an output circuit, coupled to the operational amplifier, configured for receiving the output of the operational amplifier and determining a current passing through the output circuit to generate an output signal of the driving circuit to thereby adjust an output impedance of the driving circuit; an error amplifier, having a first input terminal of the output circuit, a second input terminal coupled to a reference voltage, and an output terminal; and a controlling circuit, coupled to the output terminal of the error amplifier, configured for receiving an output of the error amplifier to adjust the current passing through the output circuit to thereby adjust the output impedance of the driving circuit; wherein the output impedance of the driving circuit is adjustable and determined by the current passing through the output circuit; the reference voltage is inputted to the operational amplifier to be used as an input signal of the operational amplifier when the controlling circuit adjusts the current passing through the output circuit.