Drive amplifier for power line communications

Details Drive amplifier for power line communications Drive amplifier for power line communications

1992-07-30

1993-08-31

Mullins, James B.

Amplifiers

Combined with automatic amplifier disabling switch means

330267, 330296, 330297, 330306, 340310R, H03F 300, H04M 1104

Patent

active

052412830

ABSTRACT:
A power line communication amplifier circuit for providing a signal transmission across a power line medium when operating in a transmit mode, and for providing a relatively high input impedance to the power line when in a receive mode includes a unity gain buffer integrally coupled with a filter. The filter operates upon an input signal provided by a digital driver means. A control means is coupled to the digital driver means and to the buffer such that when said amplifier is switched to a receive mode, both the driver means and buffer provide a high input impedance.

REFERENCES:
patent: 4746897 (1988-05-01), Shuey
patent: 4980665 (1990-12-01), Schotz
patent: 5057829 (1991-10-01), Velazquez
SSM10CE CEBus Compatible Spread Spectrum Powerline Modem, Intellon Corporation Copyright 1991.

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