direct conversion receiver


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direct conversion receiver

Also called a "tuned radio frequency" (TRF) receiver, it is a radio receiver that detects and demodulates the carrier signal broadcast by the station without using an intermediate frequency (IF) stage. A variable filter is tuned to filter out everything but the desired radio station's carrier frequency. Along with the homodyne receiver, direct conversion was one of the earlier methods of building radios, both of which were superseded by the superheterodyne approach. See superheterodyne receiver.
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References in periodicals archive ?
Tatu, "Comparative demodulation results for six-port and conventional 60 GHz direct conversion receivers," Progress In Electromagnetics Research, Vol.
For the direct conversion receiver, only the [f.sub.4] and [f.sub.5] components are considered, which fall within the receiver band to degrade the receiver signal-to-noise ratio if the interference strength is comparable to the signal sensitivity level.
This article describes a 2.4/5.7 GHz concurrent dual-band CMOS LNA for 802.11 WLAN direct conversion receiver (DCR) applications using 0.18 [micro]m technology.
Incorporating a direct conversion receiver and direct modulator on transmit, the DuettoDC is designed for low RF BOM and supports CPRS class 12 and both Edge receive and transmit.
Increased pressure for low power, small form factor, low cost and reduced bill of materials in such radio applications as mobile communications has driven academia and industry to resurrect the direct conversion receiver Long abandoned in favor of the mature superheterodyne receiver, direct conversion has emerged over the last decade or so thanks to improved semiconductor process technologies and astute design techniques.