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Multi-Rate Clock Generator Simplifies Video Equipment Design |
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Presented in a 5 mm × 5 MM package the LMH1982 multi-rate video clock generator with genlock from National Semiconductor Corp. delivers high-definition (HD) clock output jitter as low as 40 ps peak-to-peak. The device provides reference clocks for video analog-to-digital converters (ADCs), digital-to-analog converters (DACs) and field-programmable |
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Hi-Frequency Line Resistors for RF and Microwave Applications |
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Available in standard case sizes 0402 through 3838 State of the Art has expanded its line of high frequency chip resistors. The devices are optimized for 50Ω characteristic impedance using special manufacturing techniques to reduce VSWR. Power ratings for the resistors range from 50 mW up to 200W and a low return loss, up to 20 GHz. They are availa |
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Single-IC-based electronic circuit replaces mechanical switch |
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Flip-flops debounce pushbutton switch.
A simple and inexpensive electronic circuit uses a low-cost pushbutton switch to toggle the electrical power on and off. The circuit replaces a more costly and bulky push-push mechanical switch. The pushbutton switch triggers a monoshot circuit. The monoshot circuit’s output triggers a toggle flip-flop, which |
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Dual flip-flop forms simple delayed-pulse generator |
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A delayed pulse generator provides precision timing adjustments.
Some applications require clock-timing adjustments, such as generating precision clocks for time-interleaved ADCs, or delay adjustments in a variety of precision-timing and pulse-delay applications. This Design Idea describes a delayed-pulse generator using a dual-CMOS D-type fli |
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Interface MIDI instruments to a PC through a USB port |
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You can interface MIDI-equipped musical instruments to a PC via a USB port.
This Design Idea uses the FT232BM from Future Technology Devices International, a USB-to-UART interface IC that you need not program, to interface a USB port to the MIDI (musical-instrument-digital-interface) bus (Figure 1). The USB signals directly interface to IC1, an FT |
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Use thermoelectric coolers with real-world heat sinks |
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When using a Peltier thermoelectric cooler with a less-than-perfect heat sink, you must derate the maximum voltage and current applied to the cooler.
Peltier devices, also known as solid-state refrigerators, or TECs (thermoelectric coolers), actively cool temperature-sensitive electronic components, such as optical detectors and solid-state lasers |
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Critical clock-domain-crossing bugs |
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Awareness of CDC issues, along with the use of good design practices and proven EDA tools for CDC verification, can avoid costly silicon re-spins and significantly improve time to market.
Today's SOC (system-on-chip) designs have dozens of clocks, many of which are asynchronous. This design approach facilitates the convergence of digital-audio, vi |
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Ansoft releases target high-speed-circuit and electromagnetic design |
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Versions 4 of Nexxim and Ansoft Designer include new statistical-analysis and transient-simulation capabilities.
Ansoft has announced new releases of its Nexxim high-capacity circuit-simulation software and Ansoft Designer integrated schematic and design-management software, as well as new releases of its Maxwell electromagnetic field simulation s |
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Agilent, Mentor aim to cut RF-PCB design time |
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In this tool integration, the companies said PCB mixed-signal designers (RF, analog and digital) can concurrently design a PCB using Mentor's Expedition Enterprise or Board Station XE flows and integrate it with Agilent's Advanced Design System EDA software for RF design and simulation
Since system design have evolved to the point where digital, |
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