Signal receiver which indicates the status of the device connect

Details Signal receiver which indicates the status of the device connect Signal receiver which indicates the status of the device connect

1983-05-19

1985-05-07

Safourek, Benedict V.

Pulse or digital communications

Repeaters

Testing

307356, H03K 5153, H04L 2506

Patent

active

045162476

ABSTRACT:
A circuit for receiving signals from a device connected through a line meeting the requirements of EIA RS232C Standard, comprising a differential amplifier (2) receiving an input signal the amplitude of which is divided by factor k through input network (1). The switching threshold of amplifier (2) is variable and has a first value to ensure switching on the positive slope edge of the input signal and a second value to ensure switching on the negative slope edge. This circuit comprises circuits for detecting the status of the connected device, including a level detector (3) and a decision circuit (4) which, according to the outputs of the receiver and level detector (5), generates a signal indicating the status of the connected device. Integrators (5, 6) are provided for preventing the status indicating signal from changing its level when the input signal goes through zero or receives short noise pulses.

REFERENCES:
patent: 3509279 (1970-04-01), Martin et al.
patent: 3708784 (1973-01-01), Spencer
patent: 3845401 (1974-10-01), Troiani et al.
patent: 4121122 (1978-10-01), Pokrandt
patent: 4403159 (1983-09-01), Goerne et al.
patent: 4410858 (1983-10-01), Kusakabe
patent: 4418290 (1983-11-01), Nagano
patent: 4424457 (1984-01-01), Leuthold
Electronic Design, 3/31/81, vol. 29, No. 7, R. Tenny, "Transistor Circuits Convert PIA Lines to RS-232 Ports & Vice-Versa", FIG. 2.
J. G. Graeme & G. E. Toby: "Operational Amplifiers", 1971, pp. 38-43, Chapter 1, para. 1.5, McGraw Hill, London; Differential Amplifier Stage Signal Characteristics, p. 41, lines 26-28.
IBM TDB, vol. 23, No. 4, Sep. 1980, pp. 1452-1453, Y. H. Chan et al., "Long Line Receiver". p. 1452, lines 10-11.

Affiliated with

Also associated with

Rating

Signal receiver which indicates the status of the device connect does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Signal receiver which indicates the status of the device connect, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Signal receiver which indicates the status of the device connect will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1803906