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The AD736 true-rms-to-dcconverter is useful for many applications that require precise calculation of the rms value of a waveform. This converter can ... 阅读全文
posted @ 2014-11-28 15:16
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With an n- and p-channel MOSFET, you can easily implement a single-pole double-throw (SPDT) switch to isolate part of a circuit and power it from a se... 阅读全文
posted @ 2014-11-28 15:13
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Many designs need deep buffering but don't require ultrahigh-memory bandwidth. Examples include image and audio processing, as well as some deep-FIFO ... 阅读全文
posted @ 2014-11-28 14:50
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Figure 1shows an example of on/off circuitry commonly used in battery-operated devices. The p-channel MOSFET, Q1, serves as a power switch. When you p... 阅读全文
posted @ 2014-11-28 14:44
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Figure 1shows a simple, stand-alone overvoltage detector. The intent of the circuit is to monitor a voltage, VMONITOR, and set the output, VOUT, high ... 阅读全文
posted @ 2014-11-28 14:40
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posted @ 2014-11-28 14:39
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A standard technique for generating analog voltages using µCs is to use a PWM output and filter the signal with a simple RC filter (Figure 1). The vol... 阅读全文
posted @ 2014-11-28 14:38
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Short-circuit protection is an obvious requirement for a power supply, especially when its load connects to a cable that's subject to damage. Many mod... 阅读全文
posted @ 2014-11-28 14:35
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The circuit inFigure 1is a good choice if you need a power supply with high efficiency and you don't want to use expensive dc/dc-converter ICs. The he... 阅读全文
posted @ 2014-11-28 14:30
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The circuit inFigure 1produces a single debounced pulse each time you press S1. Moreover, the circuit uses only logic power from the remote pull-up re... 阅读全文
posted @ 2014-11-28 14:28
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Many applications require current sources rather than voltage sources. When you need a high-current source, using a linear regulator is inadvisable, b... 阅读全文
posted @ 2014-11-28 14:27
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Linear Technology's recently introduced LTC4300 chip buffers I2C clock and data lines to and from a hot-swappable card. This task is difficult because... 阅读全文
posted @ 2014-11-28 14:21
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The achievable accuracy for systems with multiple ADCs depends directly on the reference voltages applied to the ADCs. Medical-ultrasound-imaging syst... 阅读全文
posted @ 2014-11-28 14:18
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The easy way to clamp a signal to a given value is to use two zener diodes, connected back-to-back. This method has several disadvantages. The accurac... 阅读全文
posted @ 2014-11-28 14:14
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ECL circuits typically have relatively small logic spans of approximately 800 mV. Because of the small span, to drive TTL circuits from ECL levels nor... 阅读全文
posted @ 2014-11-28 14:13
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A number of circuits, such as level detectors and AM demodulators, benefit from a rectifier with a low offset voltage. Silicon diodes have an offset o... 阅读全文
posted @ 2014-11-28 14:10
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The circuit inFigure 1uses a minimal number of external parts to raise the maximum output current of a 0.5A buck switching-regulator IC to more than 6... 阅读全文
posted @ 2014-11-28 14:05
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Boost converters, like other switchers, have traditionally received their control signals from a dedicated circuit. However, a recent trend is to inte... 阅读全文
posted @ 2014-11-28 13:39
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The schematic inFigure 1shows a way to increase the power available from a current-limited 5V supply by adding power from a –5V supply. The dc/dc conv... 阅读全文
posted @ 2014-11-28 13:35
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In certain dc/dc-converter applications, on-chip, cycle-by-cycle current limit may be insufficient protection to prevent a failure during a short circ... 阅读全文
posted @ 2014-11-28 13:33
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