Digital transmission circuit

Details Digital transmission circuit Digital transmission circuit

1991-04-10

1993-11-30

Kuntz, Curtis

Pulse or digital communications

Repeaters

Testing

307270, 307448, H04L 2506

Patent

active

052672700

ABSTRACT:
A digital transmission circuit for processing and outputting a digital output signal includes a mark density detecting circuit for detecting the amplitude of the DC signal component of the digital signal and a DC level shifter superposing a DC signal component on the digital signal in response to the detected amplitude. Thereby, the output signal level, regardless of the mark density of the input signal, does not drift.

REFERENCES:
patent: 3509279 (1970-04-01), Martin et al.
patent: 4307465 (1981-12-01), Geller
patent: 4445222 (1984-04-01), Smitt
patent: 4459699 (1984-07-01), Monticelli et al.
patent: 4785467 (1988-11-01), Yamada
Kachwalla, "Characterizing Traps in MESFETs using Internal Transconductance (g.sub.m) Frequency Dispersion", Solid State Electronics, vol. 31, No. 8, 1988, pp. 1314-1320.
Larson, "An Improved GaAs MESFET Equivalent Circuit Model for Analog Integrated Circuit Applications", Journal of Solid-State Circuits, vol. SC-22, No. 4, 1987, pp. 567-574.
Osafune et al, "Ultra-High-Frequency GaAs MMIC Multiplier", Japanese Society of Electronics, vol. J73-C-11, No. 2, pp. 132-134.

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