Circuits & Schematics Analog Devices - 6

51. Isolated PWM suits low frequencies
    Tim Regan
    Circuits Signal Processing, Filters Analog Devices LT1719 LT6255 LTC6992-2
    Many industrial- and medical-system circuits require isolation from the mains-ac power. You can often send a signal across the isolation barrier using a small transformer; transformers do not pass low-frequency signals well. The circuit in this ...
    Apr 12, 2023
52. Anticipator circuit speeds signal settling to a final value
    Tim Regan
    Circuits Analogue Design Measurement Analog Devices LTC6257
    The circuit in this Design Idea anticipates, or jumps instantly to, the final voltage of an input-signal change. It relies on the fact that the intended input signal changes exponentially with a known time constant. This circuit was adapted from a ...
    Apr 5, 2023

53. Simple fixture statically tests programmable-gain amplifiers
    Marián Štofka
    Circuits Measurement Amplifiers Analog Devices AD8253
    The advent of instrumentation amplifiers with digital gain switching offers obvious advantages, such as board-space saving, higher reliability because of fewer solder joints, and lower total cost. These valuable features stem from the fact that the ...
    Mar 29, 2023
54. Simple anticipator circuit improves on earlier idea
    Nicholas Lockerbie
    Circuits Analogue Design Measurement Analog Devices AD820BR
    A self-biasing thermistor circuit had an overall dominant thermal/ electrical time constant as small as 25 msec but had a significantly rounded response following a square (thermal) input pulse of 100 msec; the source was a pulsed blue LED. A ...
    Mar 29, 2023
55. AGC circuit uses an analog multiplier
    Steve Lubs
    Circuits Analogue Design Analog Devices AD534
    In the AGC circuit of Fig 1, a 4-quadrant analog multiplier (IC 1 ), an amplifier stage (IC 2 ), an active, full-wave rectifier (D 1 , D 2 , R 4 -R 7 , and IC 3 ), and an integrator (IC 4 ) accomplish automatic gain control of V IN ’s ...
    Mar 28, 2023
56. LT1635 1A shunt charger
    Mitchell Lee
    Circuits Supply Analog Devices LT1635
    Most battery chargers comprise nothing more than a series-pass regulator with current limit. In solar-powered systems, you can’t count on sufficient headroom to keep a series regulator alive, so a shunt method is preferred. A simple shunt ...
    Mar 27, 2023
57. Single IC forms precision triangular-wave generator
    Akshay Bhat
    Circuits Oscillators Analog Devices MAX9000
    The linearity of triangular waveforms makes the triangular- wave generator useful in sweep circuits and test equipment. For example, switched-mode power supplies and induction motor-control circuits often include a triangular-wave oscillator as ...
    Mar 17, 2023
58. Battery simulator has variable ESR response
    Barry Galvin
    Circuits Measurement Supply Analog Devices LT1167 LT1236 LT1884
    You may lack experience and hardware when designing battery-operated products. The battery life of a product can depend more on the ESR (equivalent series resistance) than the terminal voltage. This situation is especially true when you use ...
    Mar 16, 2023
59. Finely tune the hue of blue-light sources
    Marián Štofka
    Circuits Light Analog Devices AD5228 AD590JR AD8602ARM-REEL
    When coach cars of long-range trains comprised compartments for six to eight passengers, the passengers could choose either “white” or deep blue light. The blue light helped passengers sleep, even when they were not in full darkness. ...
    Mar 14, 2023
60. Low-power, super-regenerative receiver targets 433-MHz ISM band
    Cedric Mélange Jan Vandewege Johan Bauwelinck
    Circuits Radio Analog Devices ADCMP371
    Designers often choose a super-regenerative receiver despite its frequency instability and poor selectivity for battery-powered, short-range, wireless applications in which power consumption is a major issue. Examples include remote-keyless-access ...
    Mar 1, 2023

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