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with the homodyne receiver, direct conversion was one of the earlier methods of building radios, both of which were superseded by the superheterodyne approach.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.
References in periodicals archive ?
As industry's first direct-conversion receiver for TD-SCDMA, the MAX2392 receiver includes RF LNA, direct conversion mixers, baseband filters for TD-SCDMA channel filtering, and AGC amplifiers.
Both versions include 4 LNA inputs, integrated power-management, integrated LO (local oscillator) and transmit VCOs, fractional-N PLL (phase locked loop) synthesizer, and the full direct-conversion receiver signal path.
The IC T0952 is a new member of Atmel's SiGe LNA family and can be used for conventional superheterodyne or direct-conversion receivers in 1800-MHz to 2000-MHz PCN (GSM 1800) and PCS mobile phone applications.
The IC TST0950 can be used for conventional superheterodyne or direct-conversion receivers in 925-MHz to 960-MHz GSM mobile phones and ISM applications, the TST0951 is designed for DCS and PCS mobile phone applications in the frequency range of 1800 MHz to 2000 MHz.
The combination of low noise and low distortion ensures more accurate measurement and signal representation for 14-bit ADCs used in electronic test and measurement equipment, data acquisition systems, wireless direct-conversion receivers and other wideband applications with data throughput of 40 MSPS (million samples per second) to 200 MSPS.
In testing we now solve 90 percent of customer-supplied large and complex circuits, such as direct-conversion receivers, prescalers and complex LO generation networks, when in the past we solved roughly 50 percent of these types of circuits.

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