Patent ID: 11895358
Assignee: REALTEK SEMICONDUCTOR CORPORATION
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 7:
8. An image signal transmission apparatus used in an image signal transmission system, comprising:
a digital signal processing circuit configured to generate a digital input signal; and
a signal output circuit comprising:
a front-stage driving circuit comprising a first CTLE having an adjusting capacitor and configured to receive the digital input signal to perform a high frequency enhancement thereon to increase a bandwidth of the digital input signal to generate a front-stage output signal; and
a back-stage driving circuit comprising a second CTLE without the adjusting capacitor and configured to increase a DC gain of the front-stage output signal to compensate a DC gain drop between the front-stage output signal and the digital input signal to generate a back-stage output signal to an image signal receiving apparatus;

wherein a DC gain of each of the front-stage driving circuit and the back-stage driving circuit cancels out each other when a multiplication result of a transconductance and a resistance of a load resistor of each of the front-stage driving circuit and the back-stage driving circuit is far larger than 1.