Telecommunications – Receiver or analog modulated signal frequency converter – Frequency modifying or conversion
Patent
1996-06-19
1998-07-21
Crosland, Donnie L.
Telecommunications
Receiver or analog modulated signal frequency converter
Frequency modifying or conversion
455320, 455326, 455330, 330300, 329702, 329326, 327478, H04B 128
Patent
active
057846928
ABSTRACT:
An impedance-generating device that provides a resistance and a reactance that are non-linear functions of a signal over a wide impedance range (VariablE Non-Linear Impedance Circuit Electronics, "VENICE"). An electronic component that has a gain characteristic with a unity gain frequency that is directly proportional to that signal can be configured to generate such an impedance. Such an electronic component configured to provide a negative effective resistance and a variable non-linear reactance can be used to implement a high frequency harmonic generator. This generator can provide high order harmonics which can be used in high frequency communications systems. The electronic component can also be configured to provide only a voltage-variable non-linear reactance which can be used to implement a reactive mixer to frequency shift a high frequency signal to an intermediate frequency signal, from mixing the high frequency signal with a local oscillator signal. This mixer provides a gain, at the intermediate frequency, that is the unity gain frequency of the electronic component divided by the intermediate frequency. Two stages of such mixers can be used in a homodyne circuit to generate the intermediate frequency signal without the use of off-chip bandpass filters. Also, an amplification to the intermediate frequency signal generated by the mixing can be used to implement a RF amplifier from the further modulation of this intermediate frequency signal on the local oscillator signal. These impedance-generating devices can thus implement high performance electronic circuits for communications applications.
REFERENCES:
patent: 3723755 (1973-03-01), Morse
patent: 4663599 (1987-05-01), Patch
patent: 5465418 (1995-11-01), Zhou et al.
patent: 5589791 (1996-12-01), Gilbert
Neillen Technologies Corporation "Corporate Briefing", Apr. 1995,pp. 1, 2, 16, 17, and 20.
Neillen Technologies Corporation "Corporate Overview", pp. 1, 6, and 7 Jun. 1996.
Crosland Donnie L.
Neillen Technologies, Corp.
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