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Keeping the best audio quality in mobile phone by managing voltage drops created by 217 Hz transients
By Marie Maurel, Audio Product Line Manager, Dolphin Integration |
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Whatever the protocol used by a mobile phone, GSM or TDMA, RF transmitter switching creates the most notorious noise for the power supply. The RF power amplifier switches on and off at a rate of 217 Hz. At each of these events, a high current (up to 1.7A) is drawn from the power supply, creating a sudden voltage drop on the battery equivalent serial resistance (ESR) reaching up to 500 mV. more >> |
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Come See IPTalks! at DAC 2008 |
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Live, in the ChipEstimate.com booth, hear from and meet with the world's leading IP suppliers. Two Nintendo Wii's will be given away daily to IPTalks! participants. More >> |
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DDR3 + Hard PHY = Total Solution |
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The Future of Logic NVM |
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Our PLLs and DDR DLLs are high-quality, low-jitter, silicon-proven hard macros. Available in TSMC, UMC, CHRT and Common Platform processes from 180nm to 40nm. Visit the timing experts at www.truecircuits.com.
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IBM settles stock class action with $20M payment IBM agrees to pay $20 million in cash to settle a class action suit that claimed the company misled investors as to its expected financial results and the anticipated size... |
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DoD names engineering, science fellows for research program Nanomaterials integration, lithography, and self-powered sensors are among the six research topics a Department of Defense National Security Science and Engineering... |
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April semi sales flat with March, SIA reports Essentially flat with worldwide sales of semiconductors in March, the Semiconductor Industry Association reported today that global sales for April totaled $21.2 billion,... |
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Gartner ups 2008 semi revenue estimate, but still has inventory concerns While Gartner continues to forecast low single-digit revenue growth of 4.6% for the semiconductor market in 2008, the market research company says the estimate has... |
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ADI settles stock case with SEC for $4M Analog Devices Inc and CEO Jerry Fishman agree to settle stock-option-backdating investigation charges against them by consenting to an administrative... |
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SiliconBlue launches company with new low-power FPGA SiliconBlue, a quiet startup with heavy FPGA-industry credentials, will go against the odds today by announcing its first product: a moderate-sized, moderate-performance... |
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Direct-write e-beam system shows major promise for volume production In a paper delivered at the International Conference on Electron, Ion, and Photon Beam Technology and Nanofabrication, eShuttle lifts the curtain on a technology shift... |
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SEC investigates insider trading scheme concerning Freescale, ATI The Securities and Exchange Commission has charged a former partner at Ernst & Young and two others in an alleged insider trading scheme concerning Freescale... |
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Melting reduces edge roughness, defects in IC features A project at Princeton University shows that surface heating of small features on an IC can reduce edge roughness and, in some situations, repair defects in metal and... |
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Novel transistor architectures boost polysilicon substrates, thick-oxide... Two research projects into novel transistor structures at the Advanced Technology Institute at the University of Surrey have extended the range of processes that might... |
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We provide Analog and MS Design projects of 90 nm and above TSMC, UMC, Tower... technologies using up to 10 metal layers. Take advantage of optimizing your standard cell library by area and power, migrate SCL, I/O cells from one technology to another. We design and port ADCs/DACs, PLLs, PGAs, adjustable and BGRF voltage supplies. Visit our experts at www.Gallery-Systems.com. more >>
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