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2001-04-05 SA900 I/Q transmit modulator for 1GHz applications
This application note reviews the basic concept of I/Q modulation and discusses the key points when designing the SA900 universal in-phase and quadrature (I/Q) modulator for an RF transmitter.
2009-08-14 RF modulator tailored for WiMAX, satellite comms
CML Microcircuits has released a new wideband RF I/Q modulator IC targeting designers of broadband WiMAX and any other wideband wireless infrastructure systems
2000-06-13 Quadrature Modulator/Demodulator IC Covers Baseband to 250MHz
This technical note examines the RF2703, a quadrature modulator/demodulator monolithic chip that performs frequency conversion (upconversion and downconversion) to and from the baseband frequency.
2006-06-14 Quadrature modulator targets IF, RF apps
ADI's new quadrature modulator operates from 50MHz to 2200MHz, making it well-suited for low intermediate frequency and radio frequency applications.
2005-11-16 Quadrature modulator offers base station system cost savings
The new quadrature modulator from Linear Tech is optimized for 850MHz to 965MHz GSM, cdma2000, ISM and RFID modulator applications.
2007-01-31 Quadrature modulator enables high-performance GSM base stations
A new high-performance quadrature modulator from Linear Technology is optimized for 850MHz to 965MHz GSM, CDMA2000, ISM and RFID modulator applications.
2000-06-09 Optimization of Quadrature Modulator Performance
This application note presents a derivation showing the relationship among the four parameters for quadrature modulators, including carrier suppression, sideband suppression, amplitude error and phase error
2008-08-25 Modulator transmits 4GHz RF output
Texas Instruments Inc. has announced a high-linearity, ultralow noise quadrature (IQ) modulator that delivers RF output transmission up to 4GHz, allowing service providers to easily support multiple wireless communications standards on a single RF transceiver card.
2009-05-06 Modulator improves wireless transmitter performance
From Linear Technology Corp. comes a new low frequency direct conversion quadrature modulator that offers superior linearity performance and low noise to enhance the dynamic range performance of base station transmitters.
2006-05-23 Modulator directly converts from baseband to 900MHz
A quadrature modulator from Linear Tech is designed for direct conversion from baseband to the 850-965MHz frequency band.
2009-04-27 Modulator combines four devices in one chip
Analog Devices Inc. has added a highly integrated modulator in its broad portfolio of RF ICs, for broadband satellite communications applications, such as very small aperture terminals
2008-05-26 Gain, LO and phase compensation in a single sideband transmitter using the AD9788 TxDAC and ADL5372 quadrature modulator
This application note describes how to use the AD9788 TxDAC from Analog Devices as a key component in a single sideband transmitter where a high dynamic range IF signal is required at the DAC output.
2008-05-28 Digital quadrature modulator gain
This application note by Ken Gentile for Analog Devices explains the basic building blocks of a digital quadrature modulator, along with an analysis of the gain through the modulator for three types of input signals.
2008-11-07 Compact modulator carries AGC for comm devices
Analog has launched a high-performance broadband I/Q quadrature modulator that incorporates automatic gain control circuitry within a compact 6mm x 6mm lead-frame chip-scale package.
2014-06-05 Analog expands RF platform with modulator, demodulator
The devices are designed for 3G/4G communication, microwave PtP radios, military/aerospace and instrumentation applications.
2000-06-12 A Direct Quadrature Modulator for 0.9GHz to 2.5GHz Wireless Systems
This technical note demonstrates how the RF2422 direct quadrature modulator performs direct modulation up to 2.5GHz to simplify a wireless transmitter.
1999-10-25 A direct Quadrature Modulator for 0.9 To 2.5 GHz wireless systems
As wireless system designs have moved from carrier frequencies at approximately 900MHz to wider band-width applications like Personal Communication System (PCS) phones at 1.8GHz and wireless local area networks at 2.4GHz, you have been forced to implement discrete RF designs because of the absence of RF integrated circuits (RFICs) at these higher frequencies. System designs at these higher frequencies have a great need for highly integrated RFICs for quadrature modulators, power amplifiers, and low noise amplifiers/mixers
2004-11-29 Modulator enables cheaper 3G wireless base station transmitters
The new direct conversion modulator from Linear Tech enables the design of next generation, less costly 3G wireless base station transmitters
2012-03-09 Modulators, demodulators operate up to 2.4GHz
Richardson RFPD's offerings target wireless infrastructure applications such as 2G, 2.5G and 3G base station radios, high-capacity radio links, WLAN, and aerospace and defense equipment.
2015-12-29 Maxim rolls out 16bit 5.9Gsps modulating RF DAC
The MAX5869 is optimised for digital video broadcast and cable applications and meets spectral mask requirements for a broad set of communication standards.
2002-05-07 Linear Tech RF chipset operates down to 1.8V
Linear Technology Corp.'s 1.8GHz to 2.7GHz RF transceiver chipset operates from 1.8V to 5.25V, and suitable for use in 802.11b-compliant and non-compliant 802.11 systems in the 2.4GHz ISM band.
2003-03-24 Bookham optical transmitter doubles operating distance
Bookham Technology plc has developed a 20Gbps optical transmitter that uses a DQPSK modulator to double the DWDM spectrum-packing efficiency
2013-03-06 Benefits of digital RF modulators to CCAP
Know the concept and advantages of a digital quadrature amplitude modulation modulator that uses the direct-RF architecture to enable a cable access platform system.
2013-04-01 A*STAR, Fujikura demo 40-60Gb/s silicon optical modulators
The devices claim to feature advanced multi-level modulation formats for high speed long-haul data transmission.
2002-12-13 Zarlink radio module integrates receiver, transmit functions
The ZL20200 radio transceiver is touted to be the first commercial device to successfully integrate call receiver and call transmit circuitry in a single chip.
2005-10-03 TI kit cuts WI development time
Texas Instruments recently introduced an easy-to-use radio frequency (RF) transmit signal chain demonstration kit that promises to speed time-to-market by cutting development time, risk and cost in wireless infrastructure apps.
2003-05-07 TI DAC supports four WCDMA carriers at half the power
The DAC5686 programmable dual DAC of Texas Instruments supports up to four WCDMA carriers, while consuming half the power of comparable solutions.
2011-08-01 Signal chain basics: Using the digital features of high-speed DACs
Here's a look at the function and value of each of the digital features in today's high-speed digital-to-analog converters.
2007-07-19 Othello chip suits 3G TD-SCDMA wireless handsets
Analog Devices Inc. has unveiled the latest addition to its family of Othello direct conversion radios and its broad TD-SCDMA product portfolio, the Othello-3T AD6552.
2005-08-22 DACs with 500MS/s update rates
Maxim expanded its high-speed data-converter portfolio by introducing 10 low-power, high-dynamic-performance, pin-compatible, 12-/14-/16-bit, dual digital-to-analog converters with update rates up to 500MS/s
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