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with the homodyne receiver, direct conversion was one of the earlier methods of building radios, both of which were superseded by the superheterodyne approach.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.

A broadband low power high isolation double-balanced subharmonic mixer for 4G applications

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.

The effects of I[P.sub.2] impairment on an 802.11a OFDM direct conversion radio system

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.

A fully-integrated 2.4/5.7 GHz concurrent dual-band 0.18 [micro]m CMOS LNA for an 802.11 WLAN direct conversion receiver

IP2 REQUIREMENTS FOR A GSM DIRECT CONVERSION RECEIVER

Two-tone vs. single-tone measurement of second-order nonlinearity. (Technical Feature)

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.

Quadband GSM/GPRS transceiver. (New Products - Integrated Circuits)

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.

ON THE DIRECT CONVERSION RECEIVER -- A TUTORIAL