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Heat Accumulators

Local-area-network-amplifier-for-twisted-pair-lines

Composite material for induction heating

OF THE INVENTION The manufacture of the induction cookware material of this invention is ...

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Local area network amplifier for twisted pair lines

Details

Inventors: Graham, Martin H.; Ireland, Anthony J.; Miller, Mark; Taylor, Matthew;
Assignee: Tutankhamon Electronics, Inc. (Pleasant Hill, CA)
Primary Examiner: Mullins; James B.
Assistant Examiner:
Attorney, Agent or Firm: Blakely, Sokoloff, Taylor & Zafman

An amplifier for use with a twisted pair LAN. Each stage of the amplifier provides amplification including higher frequency emphasis for a predetermined length of line. The correct number of stages are automatically activated within the amplifier. Thus a singly configured amplifier may be used for different line lengths.

DETAILED DESCRIPTION An amplifier for amplifying a signal transmitted over a line, where the line attenuates higher frequencies more than lower frequencies is described.
A plurality of cascaded stages are used, each stage includes a predetermined amplification with higher frequency emphasis.
Each stage of the amplifier further is able to pass an input signal to the stages output with substantially no amplification (unity gain) when the input signal to that stage is above a predetermined level.
In one embodiment of the present invention, each stage is able to saturate or limit when the input signal reaches a predetermined level.
In another embodiment, the peak to peak amplitude of the input signal to the amplifier is examined allowing an estimate to be made of the length of line through which the signal has passed.
This estimate is used to activate amplification through an appropriate number of amplifier stages.
Other aspects of the present invention will be apparent from the following Detailed Description.

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