| 摘要 |
The present invention provides a novel method for a driving a cable and a cable driver circuit that are relatively insensitive to parasitic capacitance. The present invention provides a cable driver circuit and a method of driving a cable that is relatively insensitive to variations in load impedance. In one embodiment, a source-follower circuit with a complementary metal oxide semiconductor (CMOS) implementation effectuates a cable driver circuit, Which needs no operational amplifier for its functionality. In one embodiment, the cable driver circuit utilizes an internal precision voltage reference with a two-stage CMOS differential voltage amplifier, and a CMOS current mirror to generate a constant current source. The resulting constant current source delivers a signal compliant with the ITU-G703 specification, and which is stable and compliant over a wide range of load impedance values and associated capacitive milieus.
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