Modulators / Demodulators

Tutorials & Webcasts

Solutions for Fitting High Performance RF Signal Chains into Small Spaces
This webinar will present the current state of integration of RF IC technology, with a focus on the challenges that non-handset-based wireless equipment designers face as they strive for more functionality in smaller spaces, sometimes with the added headache of having to implement broadband transceivers that can be reused at multiple frequencies.

Fundamentals of the RF Transmission and Reception of Digital Signals
Digital Modulation is an important topic for RF designers because most modern day transceivers transmit and receive digitally modulated data. In this webcast, part of ADI's continuing FUNDAMENTALS OF DESIGN series we will introduce you to the challenges—and solutions—for digital modulation. This webcast is a great way for beginners to get introduced to this vital communications standard or for veteran RF designers learn what's new in the field.

Interfacing RF Components
Few things are as critical to the success to any RF design as the interfacing of the stages within the receiver and transmitter. Harmonics, undesired attenuation, and other deficiencies can manifest themselves in a circuit in which the stages are not properly connected. This webcast will introduce the best practices that will help you get the most out of your RF circuit.

Modulators/Demodulators Technical Articles

Semiconductors Simplify Direct-Conversion Design
Advances in semiconductor processes have enabled integrated circuits with the performance needed for wireless infrastructure direct-conversion receivers for multi-mode communications systems. (Microwaves & RF, 3/2010)

Integrated Devices Arm Infrastructure Radios
These highly integrated circuits combine PLLs, VCOs, modulators, and mixers using an advanced SiGe BiCMOS process to save space without sparing electrical performance. (Microwaves & RF, September 2009)

Direct Conversion Receiver Designs Enable Multi-standard/Multi-band Operation
Modern direct conversion provides a compelling solution for field programmable radio designs and offers a cost benefit and potential performance advantage over traditional receiver solutions. (RF Designline, 2/16/2009)

Detecting Fast RF Bursts using Log Amps by Yuping Toh, Analog Devices, Inc. (pdf, 174 KB)

A VSA approach is a reasonable and qualitative solution for assessing the demodulator noise figure at the baseband. (Microwaves & RF, 11/20/2008)

Semiconductors Simplify Direct-Conversion Design
Advances in semiconductor processes have enabled integrated circuits with the performance needed for wireless infrastructure direct-conversion receivers for multimode communications systems. (Microwaves & RF, 3/2010)

Medical Devices Get A Prescription For Wafer-Level Chip-Scale Packaging
You no longer need to go to the hospital for your next medical treatment. Now, you can carry medical devices wherever you go—and that means small size and low-power design requirements. (Electronic Design, July 23, 2009)

Low Power Continuous Wave (CW) Doppler for Portable Ultrasound Systems

Single-Sideband Upconversion of Quadrature DDS Signals to the 800-to-2500MHz (pdf, 328 kB)

Simplifying Direct-Conversion Tx Paths in Wireless Designs (CommsDesign, 11/6/2002)

Techniques Simplify Wireless Transmission
... Approaches That Were Once Thought Too Costly To Implement Now Have New Life, Thanks To The Availability Of Integrated Devices. (Wireless Systems Design, January/February 2003)

Single Chip Realizes Direct-Conversion Rx
... Direct-conversion Rxs offer advantages in simplicity compared to conventional superheterodyne approaches, although attention must be paid to some of the trade-offs. (pdf, 2518 kB) (Microwaves & RF, October 2002)

Optimizing Receiver Performance Through Error Vector Analysis by Eric Newman, Analog Devices Inc. (Microwave Product Digest, October 2004)

Streamline medical ultrasound designs with monolithic Doppler phase-shifter (eeTimes, 4/25/2005)

Assessing Multicarrier Direct-Conversion Transmitters By Eamon Nash, Analog Devices,Inc. (Microwaves and RF, Feb 2004)

How Ultrasound System Considerations Influence Front-End Component Choice by Eberhard Brunner, Analog Devices, Inc. (Analog Dialogue Vol. 36, May-July 2002)

Brochures & Bulletins

RF/IF Selection Guide

RF IC Solutions Bulletin

Data Sheets

Modulator/Demodulators Data Sheet

Parametric Search

Demodulators

Demodulators with Integrated LOs

Modulators

Modulators with Integrated LOs

Vector Modulators

Tools
ADIsimRF™
Video: ADIsimRF™

ADIsimPLL™
Video: ADIsimPLL™

EngineerZone Support Community

Circuits from the Lab

CN-0144: Broadband Low Error Vector Magnitude (EVM) Direct Conversion Transmitter Using LO Divide-by-2 Modulator (pdf 198 KB)

CN-0134: Broadband Low Error Vector Magnitude (EVM) Direct Conversion Transmitter (pdf, 397 KB)

CN-0070: Precise Control of I/Q Modulator Output Power Using the ADL5386 Quadrature Modulator and the AD5621 12-Bit DAC (pdf, 128 KB)

CN:0062: Interfacing the ADL5382 Quadrature I/Q Demodulator to the AD9262 16-Bit Continuous Time Sigma-Delta ADC as an RF-to-Bits Solution (pdf, 104 KB)

CN-0021: Interfacing the ADL5375 I/Q Modulator to the AD9779A Dual-Channel, 1 GSPS High Speed DAC (pdf, 132 KB)

CN-0020: Interfacing the ADL5374 I/Q Modulator to the AD9779A Dual-Channel, 1 GSPS High Speed DAC (pdf, 127 KB)

CN-0019: Interfacing the ADL5373 I/Q Modulator to the AD9779A Dual-Channel, 1 GSPS High Speed DAC (pdf, 127 KB)

CN-0018: Interfacing the ADL5372 I/Q Modulator to the AD9779A Dual-Channel, 1 GSPS High Speed DAC (pdf, 122 KB)

CN-0017: Interfacing the ADL5371 I/Q Modulator to the AD9779A Dual-Channel, 1 GSPS High Speed DAC (pdf, 122 KB)

CN-0016: Interfacing the ADL5370 I/Q Modulator to the AD9779A Dual-Channel, 1 GSPS High Speed DAC (pdf, 122 KB)

Modulators/Demodulators Application Notes

AN-1100: Wireless Transmitter IQ Balance and Sideband Suppression (pdf, 185 KB)

AN-0996: The Advantages of Using a Quadrature Digital Upconverter (QDUC) in Point-to-Point Microwave Transmit Systems"> (pdf, 219 KB)

AN-920: Gain, LO, and Phase Compensation in a Single Sideband Transmitter Using the AD9788 TxDAC and ADL5372 Quadrature Modulator (pdf, 232 KB)

AN-0974: Multicarrier TD-SCMA Feasibility (pdf, 634 KB)

AN-924: Digital Quadrature Modulator Gain (pdf, 105 KB)

AN-1039: Correcting Imperfections in IQ Modulators to Improve RF Signal Fidelity (pdf, 202 kB)

AN-808: Multicarrier CDMA2000 Feasibility (pdf, 1535 kB)
The goal of this application note is to determine the feasibility of implementing a multicarrier CDMA2000 transceiver and what the major subsystem performances must be.

AN-826: A 2.4 GHz WiMAX Direct Conversion Transmitter (pdf, 417 KB)