Cavey, "Even harmonic double-balanced active mixer for use in direct conversion receivers
," IEEE J.
Note that there are four other symmetric second-order tones located on the right side of the main input signals, which are not drawn here since these tones are located outside the band of interest for the direct conversion receiver
Second-order nonlinearity is a phenomenon that is important in direct conversion receivers
More importantly, however, large blocking signals also cause DC in the direct conversion receiver
, whether on a spurious frequency or not.
The RF transceiver consists of a direct conversion receiver
, a transmitter with integrated voltage controller oscillators (VCO) that utilizes Skyworks' Polar Loop modulation technology, and a fully integrated Fractional-N synthesizer.
The LS2401 includes a direct conversion receiver
from radio frequency (RF) to analog I/Q baseband signals, and can support data throughputs above 22 Mb/s.
The key innovations in SMARTi DC are the outstanding direct conversion receiver
with integrated Low Noise Amplifiers (LNA), the complete integrated RF Voltage Controlled Oscillator (VCO) and the new direct modulator transmitter offering extremely low noise floor performance.
TDK Semiconductor, a leader in the design and manufacture of communication semiconductors for worldwide markets, Monday introduced a new low cost, high performance direct conversion receiver
(DCR) integrated circuit for digital wireless applications, including digital satellite and VSAT receivers.
The part includes a direct conversion receiver
, a quadrature demodulator, dual IF amplifiers (with gain control and RSSI), on-chip programmable baseband filters, dual data comparators and a serially programmable 86-channel PLL frequency synthesizer.
It is a complete radio design that combines multiple functions, including an RF front end, mixed-signal baseband section, frequency synthesizers, two analog-to-digital converters and two direct conversion receivers
in a single chip.
Bellaouar, "A 2 GHz CMOS Even Harmonic Mixer for Direct Conversion Receivers
," 2000 International Symposium on Circuits and Systems Digest, pp.