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Серия «Телевизоры и моноблоки» (стр. 1 )
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TV I. TV HC. TVA MK8. GTV GTV T. Baroness Color Consul Color Herzog Color Prafekt Color Reichsgraf Color C 20XA5. C 22XA5. Amalienburg CUC Digi 6.
E IDTV. Einschub Eleganz ELITE Greenville 37 SP Text. Greenville text. Hohenstein M IDTV. M M A. M Refernce.
Miami SE text. MW PALplus. P OIRT. P IR. P TEXT. P FR. ST Text. ST text. ST DPL. ST ST TOP. Super Color FR. Super Color Super Color GB. Super Color S Super Color S Video. Super Color W Super Color Super Design FR. T TEXT. T OIRT. T a text. T FT GB. T FR. Trutzenstein TC CPT CST P. CST S. COLOR Compact 80KSK. CT UK. Digivision The present invention also relates to under-sampling and to transferring energy at aliasing rates. Electromagnetic EM information signals baseband signals include, but are not limited to, video baseband signals, voice baseband signals, computer baseband signals, etc.
Baseband signals include analog baseband signals and digital baseband signals. It is often beneficial to propagate EM signals at higher frequencies. This is generally true regardless of whether the propagation medium is wire, optic fiber, space, air, liquid, etc. To enhance efficiency and practicality, such as improved ability to radiate and added ability for multiple channels of baseband signals, up-conversion to a higher frequency is utilized. Conventional up-conversion processes modulate higher frequency carrier signals with baseband signals. Modulation refers to a variety of techniques for impressing information from the baseband signals onto the higher frequency carrier signals.
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The resultant signals are referred to herein as modulated carrier signals. For example, the amplitude of an AM carrier signal varies in relation to changes in the baseband signal, the frequency of an FM carrier signal varies in relation to changes in the baseband signal, and the phase of a PM carrier signal varies in relation to changes in the baseband signal. In order to process the information that was in the baseband signal, the information must be extracted, or demodulated, from the modulated carrier signal.
However, because conventional signal processing technology is limited in operational speed, conventional signal processing technology cannot easily demodulate a baseband signal from higher frequency modulated carrier signal directly. Instead, higher frequency modulated carrier signals must be down-converted to an intermediate frequency IF , from where a conventional demodulator can demodulate the baseband signal.
Conventional down-converters include electrical components whose properties are frequency dependent.
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As a result, conventional down-converters are designed around specific frequencies or frequency ranges and do not work well outside their designed frequency range. Conventional down-converters generate unwanted image signals and thus must include filters for filtering the unwanted image signals. However, such filters reduce the power level of the modulated carrier signals.
As a result, conventional down-converters include power amplifiers, which require external energy sources. When a received modulated carrier signal is relatively weak, as in, for example, a radio receiver, conventional down-converters include additional power amplifiers, which require additional external energy. Briefly stated, the present invention is directed to methods, systems, and apparatuses for down-converting an electromagnetic EM , and applications thereof. Generally, in an embodiment, the invention operates by receiving an EM signal and recursively operating on approximate half cycles of a carrier signal.
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