High-speed data converters maximise receiver sensitivity and dynamic range for 3G and 4G cellular base stations
May 26, 2011 // Paul Buckley
Analog Devices Inc. has introduced four high-speed data converter products that support signal sampling rates necessary to accommodate multi-carrier radio platform requirements for today’s 3G and 4G cellular infrastructure communication- standards, including CDMA2000, UMTS/LTE, TD-SCDMA and TD-LTE.
The AD6649 is the industrys first IF diversity receiver able to monitor the incoming signal power and adjust the VGA gain setting directly without the need for a microprocessor. It integrates many of the functions required for a diversity receive path in a single device, including an ultra-low-latency peak detector and a rms signal power monitor. There is also an integrated DDC (digital down converter) that includes a 32-bit NCO (numerically-controlled oscillator), a decimating half-band filter and an output FIR (finite-impulse response) filter that provides an effective band-pass filtering function and reduces the output rate.
The AD6643 is an IF diversity receiver for cost-sensitive applications that integrates two high performance A/D converters and noise shaping requantiser (NSR) digital blocks. The integrated NSR circuitry allows for improved SNR (signal-to-noise ratio) performance in a smaller frequency band within the Nyquist bandwidth. With the NSR feature enabled, the outputs of the A/D converters are processed such that the AD6643 supports enhanced SNR performance within a limited portion of the Nyquist bandwidth while maintaining 11-bit output resolution. The NSR block can be programmed to provide a bandwidth of either 22 percent or 33 percent of the sample clock.All news
Europe leads world in chip market growth
September 02, 2014
In July the European region showed the strongest year-on-year growth of all regions tracked by the World Semiconductor Trade ...
Radar-based blind spot assist to eliminate collisions during turning
German company wins bid to crash cars in China
European semiconductors sales up 14.9% this year
EE Times' annual salary & opinion survey report
Toshiba announces image sensor strategy
September 01, 2014
Toshiba Corp. has issued a press release detailing its strategy for the image sensor market.
DelfMEMS promotes CFO to CEO
Sensata to pay $1-bn for tire pressure sensor leader
ADCs for high dynamic range – successive-approximation or sigma-delta?
- Power Modules: The New Super Power
- Flexible Performance for Network Security Appliances
- Digital Power Management Reduces Energy Costs While Improving System Performance
- Using RF Recording Techniques to Resolve Interference Problems
InterviewA question of Europe
Sir Peter Bonfield sits on the board and has advisory roles in many international companies and universities. With more than 45 years of experience in electronics, computers and communications, here he ...
Filter WizardCheck out the Filter Wizard Series of articles by Filter Guru Kendall Castor-Perry which provide invaluable practical Analog Design guidelines.
Linear video channel
READER OFFERRead more
This month, Trinamic Motion Control is offering you to win one of four TMCM-1043 development kits for its highly integrated, NEMA 17-compatible TMCM-1043 stepDancer stepper motor module.
Offering designers an easy-to-use PC-based GUI that allows one-click modification of motor drive current, micro-stepping and other key parameters, the intuitive kits are custom designed and developed for...MORE INFO AND LAST MONTH' WINNERS...
December 15, 2011 | Texas instruments | 222901974
Unique Ser/Des technology supports encrypted video and audio content with full duplex bi-directional control channel over a single wire interface.