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Current Monitors / Sensors/ Detectors Circuits, Page 1
Sensors / Detectors -- Main Page
Current Monitors / Sensors/ Detectors:  #-B    C    D-Q     R-Z

Last Updated on:
Friday, August 29, 2008 02:33 PM
 
Circuits Designed by Dave Johnson, P.E. :
  • AC Current Monitor
    The hobby circuit below shows how a small current transformer from Magnetek can be used to monitor AC current to a load.  The AC voltage developed at the secondary of the transformer can be scaled so it can be read by any digital multimeter.  The transformer is rated at 30 amps.


Links to electronic circuits, electronic schematics, designs for engineers, hobbyists, students & inventors:

4  to 20 Mloop Needs No External Power Source:  09/13/2001 EDN - Design Ideas / ((added 2/05)  The simple circuit in Figure 1 uses a low-current-drain MAX4073H amplifier to sense the current flowing through a 4- to 20-mA loop. The circuit senses the current through a 1Ω resistor with a fixed gain of 100 and uses no battery or dc power supply. The low current drain of the amplifier (0. .

A 4  to 20 mA loop needs no external power source:  09/13/01 EDN Design Ideas  / (added 11/05)  The simple circuit in Figure 1 uses a low-current-drain MAX4073H amplifier to sense the current flowing through a 4- to 20-mA loop. The circuit senses the current through a 1Ω resistor with a fixed gain of 100 and uses no battery or dc power supply. The low current drain of the amplifier (0.

A Design and Manufacturing Guide for the Lead Frame Chip Scale Package (LFCSP):  AN-772 - Analog Devices Application Notes  (added 2/06)

A User's Guide to I.C. Instrumentation Amplifiers:  AN-244 - Analog Devices Application Notes  (added 2/06)

AC Current Monitor:  Senses high current-flow into power cables.  No wire-cutting, three versions available.  (circuit design added 3/05)

AC Line Current Detector:  (circuit added 7/02)

Active Feedback IC Serves as Current Sensing Instrumentation Amplifier:  07/24/03 EDN Design Ideas  /  (Circuit / schematic design added 6/06)  High-speed current sensing presents a designer with some significant challenges. Most techniques for sensing current involve measuring the differential voltage the current produces as it flows through a sense element, such as a resistor or a Hall-effect device. The differential voltage across the sense element is generally small and is often riding on a common-mode voltage that is considerably ......

Active feedback IC Serves as Current sensing instrumentation Amplifier:  07/24/03 EDN Design Ideas  /  (added 1/05)  High-speed current sensing presents a designer with some significant challenges. Most techniques for sensing current involve measuring the differential voltage the current produces as it flows through a sense element, such as a resistor or a Hall-effect device. The differential voltage across the sense element is generally small and is often riding on a common-mode voltage that is considerably ......

AN-244: A User's Guide to I.C. Instrumentation Amplifiers:  AN-244 - Analog Devices Application Notes  (added 2/06)

AN-245: Instrumentation Amplifiers Solve Unusual Design Problems:  AN-245 - Analog Devices Application Notes  (added 2/06) Traditionally Considered Only for Transducer-Conditioning Applications, Instrumentation Amplifiers Bring Unique Performance Benefits to a Range of Other Applications as Well.

AN-282: Fundamentals of Sampled Data Systems:  AN-282 - Analog Devices Application Notes  (added 2/06)

AN-345: Grounding for Low-and-High-Frequency Circuits:  AN-345 - Analog Devices Application Notes  (added 2/06) Know Your Ground and Signal Paths for Effective Designs. Current Flow Seeks Path of Least Impedance-Not Just Resistance....

AN35 High-Side Current Sensing: Considerations and Applications for High-Side Current Monitoring:  Zetec Semiconductors  - Applications Notes -  A guide for using the ZXCT range of products. Contained within the note are application ideas for extended supply ranges, a circuit for bi-directional current sensing and an over-current/short circuit protection circuit. Now updated and contained within AN39   (added 2/06)

AN39 Current Measurement Applications Handbook:  Zetec Semiconductors  - Applications Notes - This applications handbook explores how the requirements affect the design for AC and DC current measurement and the implications on cost and performance for different approaches.   (added 2/06)

AN-539: Errors and Error Budget Analysis in Instrumentation Amplifier Applications:  AN-539 - Analog Devices Application Notes  (added 2/06) Describes a systematic approach to calculating the overall error in an instrumentation amplifier application.

AN-589: Ways to Optimize the Performance of a Difference Amplifier:  AN-589 - Analog Devices Application Notes  (added 2/06) This Application Note presents several ways to build and optimize the performance of a discrete difference amplifier. It also recommends amplifiers that will make the overall solution cost/performance competitive with monolithic instrument amplifiers.

AN-597: Current Feedback Amplifiers:  National Semiconductor - Application Note   (added 2/06)

AN-671: Reducing RFI Rectification Errors in In-Amp Circuits:  AN-671 - Analog Devices Application Notes  (added 2/06)

AN-683: Strain Gage Measurement using an AC Excitation:  AN-683 - Analog Devices Application Notes  (added 2/06)

AN-772: A Design and Manufacturing Guide for the Lead Frame Chip Scale Package (LFCSP):  AN-772 - Analog Devices Application Notes  (added 2/06)

AN-840: Development of an Extensive SPICE Macromodel for 'Current-Feedback' Amplifiers:  National Semiconductor - Application Note   (Circuit / schematic design added 6/06)

Analog input circuit Serves any microController:  12/20/01 EDN - Design Ideas / (Electronic circuit added 10/03)  The simple ADC in Figure 1 is perfect for getting analog signals into a purely digital microcontroller. Using just five surface-mount parts, you can assemble it for less than 50 cents (1000), which is approximately half the cost of a single-chip-ADC approach in the same volume. Moreover, this design takes only one pin from the microcontroller to operate. .

Bias Voltage and Current Sense Circuits for Avalanche Photodiodes:  AN92 - Linear Technology - Avalanche photodiodes, used in laser based fiberoptic systems, require high voltage bias and accurate, wide range current monitoring. Bias voltage varies from 15V-90V and current ranges from 100nA to 1mA, a 10,000:1 dynamic range. This publication presents various 5 volt powered circuits which meet these requirements. Appended sections detail specific circuit techniques and cover measurement practice.

Current Monitors / Sensors/ Detectors:  #-B    C    D-Q     R-Z



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