Output circuit and interface system comprising the same

Details Output circuit and interface system comprising the same Output circuit and interface system comprising the same

1991-12-26

1993-08-10

Hudspeth, David R.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307443, 3072968, H03K 190185

Patent

active

052352226

ABSTRACT:
An output circuit 1 comprises a constant current source 11, a switch 12, and an output pad 14. The switch 12 is connected between the constant current source 11 and the output pad 14. A transmission path 3 is connected to the output pad 14. The transmission path 3 is coupled to a terminator voltage V.sub.TT by a resistor for pull up. Reflection of a signal or generation of noise can be suppressed by bringing the resistance value of the resistor 4 close to a characteristic impedance of the transmission path 3. A voltage amplitude on the transmission path 3 can be determined arbitrarily by adjusting current value of the constant current source 11 and resistance value of the resistor 4.

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patent: 5030855 (1991-07-01), Leung
Mavor et al., Introduction to MOS LSI Design, chapter 6.14, "Output circuits" .COPYRGT.1983 by Addison-Wesley Publishers Limited.
Song and Gray, "A Precision Curvature-Compensated CMOS Bandgap Reference," IEEE Journal of Solid-State Circuits, vol. SC-18, No. 6, (Dec. 1983), pp. 634-643.

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