CMOS differential twisted-pair driver

Electronic digital logic circuitry – Interface – Current driving

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Details

326 58, 326 30, H03K 190175

Patent

active

054184789

ABSTRACT:
A CMOS differential twisted-pair driver which utilizes CMOS switches and current sources advantageously. No alternative power supply is required, the switches do not have to be low impedance and the device is low power. The preferred embodiment driver further limits signal overshoot and common mode energy. The signal transmission facility is bi-directional so an off state is provided. It is doubly terminated to provide for symmetry, improved bandwidth and reduces reflective signal noise. The double termination also provides for faster rise and fall times which reduces the systems sensitivity to receiver offset.

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patent: 4980580 (1990-12-01), Ghoshal
patent: 5105107 (1992-04-01), Wilcox
patent: 5111080 (1992-05-01), Mizukami
patent: 5122690 (1992-06-01), Bianchi
patent: 5216297 (1993-06-01), Proebsting
patent: 5235222 (1993-08-01), Kondoh
patent: 5287022 (1994-02-01), Wilsher
patent: 5313118 (1994-05-01), Lundberg

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