Pulse or digital communications – Transceivers
Patent
1994-01-06
1996-07-23
Rogers, Scott A.
Pulse or digital communications
Transceivers
327545, 327535, 327534, 307 11, H04L 2549
Patent
active
055397719
ABSTRACT:
A communication line driver for a communication interface includes on one chip, a trimming circuit for adjusting a reference voltage generated by a reference voltage generating circuit, a driving device for transmitting a signal to a communication line; a buffer for applying a constant voltage to the driving device by a constant voltage control based on an output of the trimming circuit, and a bias circuit for deciding an internal operating current of the buffer on the basis of the output of the trimming circuit. The buffer further includes an MOS transistor which operates as a current limiter and functions to limit the current in case of an overload. Thus, a resistor for the current control is unnecessary. An electric power consumption can be reduced by the current limitation at the time of overload.
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patent: 5047663 (1991-09-01), Lee et al.
patent: 5051626 (1991-09-01), Kajii
Hashimoto Shigeyuki
Noda Takaaki
Anh-Vinh Madeleine
Hitachi , Ltd.
Hitachi Engineering Co. Ltd.
Rogers Scott A.
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