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Circuit Cellar's editorial team comprises professional engineers, technical editors, and digital media specialists. You can reach the Editorial Department at editorial@circuitcellar.com, @circuitcellar, and facebook.com/circuitcellar

New JukeBlox Wi-Fi Platform for Streaming Audio

Microchip Technology’s fourth-generation JukeBlox platform enables product developers to build low-latency systems, such as wireless speakers, sound bars, AV receivers, micro systems, and more. The JukeBlox 4 Software Development Kit (SDK) in combination with the CY920 Wi-Fi & Bluetooth Network Media Module features dual-band Wi-Fi technology, multi-room features, AirPlay and DLNA connectivity, and integrated music services.

Microchip-JukeBlox-Wifi

Streaming audio with JukeBlox

The CY920 module is based on Microchip’s DM920 Wi-Fi Network Media Processor, which features 2.4- and 5-GHz 802.11a/b/g/n Wi-Fi, high-speed USB 2.0 and Ethernet connectivity. By using the 5-GHz band, speakers aren’t impacted by the RF congestion found in the 2.4-GHz band.

The DM920 processor also features integrated dual 300-MHz DSP cores that can reduce or eliminate the need for costly standalone DSP chips. An PC-based GUI simplifies the use of a predeveloped suite of standard speaker-tuning DSP algorithms, including a 15-band equalizer, multiband dynamic range compression, equalizer presets, and a variety of filter types. Even if you don’t have DSP coding experience, you can implement DSP into your designs.

JukeBlox 4 enables you to directly stream cloud-based music services, such as Spotify Connect and Rhapsody, while using mobile devices as remote controls. Mobile devices can be used anywhere in the Wi-Fi network without interrupting music playback. In addition, JukeBlox technology offers cross-platform support for iOS, Android, Windows 8, and Mac, along with a complete range of audio codecs and ease-of-use features to simplify network setup.

The JukeBlox 4 SDK, along with the JukeBlox CY920 module, is now available for sampling and volume production.

Source: Microchip Technology

Lighting and Motor Control Shields for Arduino

Arduino enthusiasts will be excited to learn that Infineon Technologies has announced two new shields for RGB lighting and motor control. You can use the shields—which are compatible to Arduino Uno R3—with the XMC1100 Boot Kit, which is equipped with a 32-bit microcontroller of the XMC1000 family (uses the ARM Cortex-M0 processor).

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Infineon RGB XMC1202 for Arduino

The RGB LED Lighting Shield for Arduino features an XMC1202 microcontroller with its Brightness Color Control Unit (BCCU) for LED lighting control. The high-current DC Motor Control Shield for Arduino contains the Infineon NovalithIC BTN8982TA integrated half-bridge driver for motor control.

The RGB LED Lighting Shield evaluation board enables you to use different LED light engines for fast prototyping. It has three independent output channels for flicker-free control of multicolor LEDs. The BCCU automated hardware engine provides a cost-effective LED lighting solution dimming and color mixing. You can expand the shield with a DMX interface for lighting and audio nodes or a 24-GHz radar sensor for motion detection.

The DC Motor Control Shield with BTN8982TA simplifies the prototyping of DC motor control designs. It can drive two unidirectional DC motors or one bidirectional DC motor. The shield features two NovalithIC BTN8982TA fully integrated high-current half-bridge drivers optimized for motor drive applications. The BTN8982TA includes three ICs: two power chips (one p-channel high-side MOSFET and one n-channel low-side MOSFET) and an integrated driver IC with one logic circuit to control and monitor the power. Other features include are diagnosis with current sense and slew rate adjustment.

Until end of January 2015, both the RGB Lighting Shield with XMC1202 for Arduino and the DC Motor Control Shield with BTN8982TA for Arduino will be available for purchase from Newark element14. After that, they’ll also be available from Infineon and its distributors.

Source: Infineon

B&K Precision Rejuvenates Arbitrary/Function Waveform Generator Line

B&K Precision announced that it rejuvenated the 4075B Series of arbitrary/function waveform generators with higher frequency ranges, increased arb memory, and a color LCD. The new 4075B Series offers six new models that directly replace the previous 4075 line with single- and dual-channel 30-MHz (4075B/4078B) and 50-MHz models (4076B/4079B) along with two additional single- and dual-channel 80-MHz models (4077B/4080B). Each model can generate arbitrary waveforms with 14-bit amplitude resolution, a 200-Msps sample rate, and up to 16,000,000 points (depending on model). These instruments are ideal for use in electronic design, sensor simulation, and functional test.4075B_front

Designed with a dual technology architecture, the 4075B Series combines the benefits of traditional DDS (direct digital synthesis) technology and a true AWG (arbitrary waveform generator). DDS allows standard sine, square, and triangle waveforms to be generated with great frequency resolution at a low cost while the true AWG architecture implements custom arbitrary waveforms with a point-by-point design. This design significantly minimizes jitter and improves signal integrity of the arbitrary waveform.

Similar to their predecessors, the new 4075B Series generators offer a menu-driven front panel keypad with rotary encoder knob and convenient range selection buttons to make adjustments quickly and easily. Additionally, all models provide multi-unit/channel synchronization and external triggering capabilities. For precise triggering at specific points in an arbitrary waveform, users can benefit from the instrument’s fully programmable markers, which allow the unit to generate a positive TTL level signal at a specified waveform address.

The 4075B Series provides eight full memory banks per channel for user-defined arbitrary waveforms and 49 locations to store/recall instrument settings. Arbitrary waveforms can be created from the front panel or loaded using B&K’s free WaveXpress waveform editing software. WaveXpress is a comprehensive stand-alone application that offers several waveform editing tools for users to easily create and load complex arbitrary waveforms onto the AWG via the SCPI-compatible USBTMC or GPIB (50 and 80 MHz models only) interface on the rear.

Other features of the 4075B Series include AM/FM/FSK modulation schemes, linear and logarithmic sweep, and built-in overvoltage and short circuit protection for resistive and capacitive loads on all inputs and outputs to prevent accidental damage to the instrument.

Available immediately, B&K Precision’s 4075B Series products are all backed by a standard 3-year warranty and listed at the following prices ranging from $1,495 (Model 4075B) to $3,690 (Model 4080B).

Source: B&K Precision

 

Low-Jitter 1.25-GSPS Clock Optimizes JESD204B Serial Interface Functionality in GSPS Data Converter Applications

Analog Devices recently introduced the AD9528 JESD204B clock and SYSREF generator defined to support the clock requirements for long-term evolution (LTE) and multicarrier GSM base station designs, defense electronics systems, RF test instrumentation, and more. According to Analog devices, the JESD204B interface was developed “to address high-data rate system design needs, and the AD9528 clock device contains functions that support and enhance the unique capabilities of that interface standard.”

The AD9528 provides a low-power, multi-output, clock distribution function with low-jitter performance, along with an on-chip, two-stage PLL and VCO. The on-chip VCO tunes from 3.6 to 4.0 GHz.

When connected to a recovered system reference clock and a VCXO, the AD9528 generates 12 low-noise outputs with a range of 1 to 400 MHz and two high-speed outputs at up to 1.25 GHz. The frequency and phase of one clock output relative to another clock output can be varied by means of a divider phase-select function that serves as a jitter-free, coarse timing adjustment in increments that are equal to half the period of the signal coming from the VCO output. The SYSREF signals each have additional phase offset capability making it easy to dial-in the optimal arrival time at each target device.

The AD9528 can be designed into wideband RF data acquisition applications with ADI’s AD9680 dual-channel, 14-bit, 1.0-GSPS JESD204B A/D converter.

The AD9528BCPZ costs $8.25 in 1,000-piece quantities. The evaluation board costs $190.

Summit Semiconductor Extended Distance Modules Support WiSA Whole House Audio Specification

Summit Wireless, a division of Summit Semiconductor (from Portland, Oregon), supported the Wireless Speaker and Audio (WiSA) Association demonstrations at the CEDIA Expo 2014 in September. During the show, WiSA announced new multi-zone requirements and feature set for simultaneous support of both wireless home theater playback and multi-zone stereo audio streams. WiSA compliant systems should be able deliver high resolution, uncompressed audio, up to 100 m line of sight or 20 to 40 m through walls.SummitWiSAAmopReferenceDesignWeb

Summit Semiconductor confirms availability of new extended distance transmit and receive modules for those multi-zone home theater and whole home audio applications with support to the WiSA Association’s updated compliance and interoperability test specification.

WiSA members recognize the growth of whole house stereo audio solutions in the market place and the practical need to keep system cost down for mass market acceptance. With the new extended distance radio capabilities, a single system will also provide consumers with a WiSA-compliant home theater system and a whole house system.

The new Summit Semiconductor modules can transmit high quality, uncompressed audio up to 100 m line of site. When integrated in an AVR, audio hub, HDTV, Blu-ray player or gaming console, a single transmit module can manage up 32 speakers, and 8 different zones with separate volume control while simultaneously supporting both home theater and multi-zone audio transport. For example, during the CEDIA Expo the WiSA Association demonstrated a wireless 5.1 home theater system with Summit’s extended distance modules that will also simultaneously transmit a separate stereo pair with different content to a separate location.

The new extended distance modules come pre-certified by country and are backward compatible to the prior generation of Summit’s home theater wireless modules. Engineering samples for the new extended distance modules are available from Summit Semiconductor.

“We’re excited to offer the new extended distance modules in support of the WiSA Association’s multi-zone and whole house initiative,” says Tony Parker, vice president of marketing, Summit Semiconductor. “This is a perfect tool for audio products that need high resolution multi-channel audio, but want to appeal to a broader base as a multi-media whole house platform. Products such as a HDTV, AVR/Pre-amp, game console, soundbar and HTiB can benefit significantly from adding these modules to their designs.”

Source: Summit Semiconductor