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Active Filter Design with OpAmps

Wed, 11/12/2024 - 4:55am by deadmin

Analog Design

This is yet another Application Note of Exar found in- "Applications Data Book" June 1981. The availability of low cost dual or quad operational amplifier IC's have made the operational amplifier based active filter techniques cost effective over conventional passive filters.

The recent availability of programmable quad operational amplifiers such as the XR-4202 or the XR-346 have provided the active filter designer with the flexibility to externally program gain-bandwidth product, supply current, input bias current, input offset current, input noise and the slew rate.

Tech-Reference

LM723 Power Electronics Workhorse

Tue, 03/12/2024 - 10:25pm by deadmin

Power Electronics

This is another versatile and flexible chip. I could design current sources, voltage to current transmitters, level translation and many more. You can think of applications beyond the Power Electronics Scope with this. Input voltage up to 40V, Output voltage adjustable from 2 to 37V, Output current to 150mA without external pass transistor and Adjustable current limiting.

"The circuit provides internal current limiting. When the output current exceeds 150mA an external NPN or PNP pass element may be used. Provisions are made for adjustable current limiting and remote shutdown."

Integrated-Circuits

LM335 Cold Junction Compensation

Mon, 02/12/2024 - 12:48am by deadmin

Analog Design

Temperature Sensors like Thermocouples need cold junction compensation as a part of front end signal conditioning, this is done at the terminal block where the Thermocouple wires are terminated. This design has to be more accurate and broad, if the design we make has to work well in both Tropical and Temperate Climate Zones.

Another Method using a Copper Resistor

Sensors

Flintec precision Weight Measurement

Tue, 05/11/2024 - 8:01am by deadmin

Process Control

Flintec are a world leading manufacturer of weight and force measurement devices. We supply load cells, force sensors and weighing electronics to a wide range of industries and applications. Whatever your weight or force measurement needs, Flintec can supply a range of standard products, our team of engineers can also help if you require a distinctive, customised, solution.

Flintec precision Weight Measurement

Sensors

Beige Bag Software User Resources

Sun, 03/11/2024 - 1:00am by deadmin

Analog Design

The latest version of the popular and powerful mixed mode simulator builds upon B2 Spice A/D v4's powerful capabilities to reach new standards in ease-of-use, power, and capabilities. Virtual Instruments - oscilloscope, ammeter, voltmeter, wattmeter, distortion meters. Curve Tracer to plot the behavior of a device before you place it in your circuit.

B2 Spice v.5 Circuit Simulation Software

Beige Bag Software User Resources

Tools

interfacebus.com - Interface and Cable design

Sat, 02/11/2024 - 1:12am by deadmin

Computer Interfacing

Providing detailed electronic design information regarding Interface, Computer, Cable, Processor and Embedded Buses. - Leroy Davis Buses used on Personal Computers, Computers & Peripherals, Standards, Wireless, Logic Design.

interfacebus.com - Interface and Cable design

The site is geared toward Engineers who develop or design equipment. There are 3 main sections; OEM Equipment / Components listings, Computer buses, and engineering design data.

Interface-Circuits

Erlich Industrial Development Corporation

Mon, 28/10/2024 - 3:47am by deadmin

Test Instrumentation

High-end computerized lab equipment, accessories and sensors. They also manufacture OEM transducers, signal conditioners, industrial standards interface boards and kits. (USA Firm). Erlich Industrial Development Corporation (EID) is an OEM manufacturing and R&D Company specializing in the development of high technology biological, medical and chemical research products.

Adjustable Output Positive Voltage Power-Supply Kit

Sensors

BD139 and BD140 Complementary Transistors

Wed, 09/10/2024 - 3:20am by deadmin

Resources

This pair is my favorite when driving small solenoids or motors. SOT-32 and 12 Watts on Heatsink. This means any small solenoid, relay or DC motor can be controlled with this. I would use it upto 24V DC and max of 1A for applications of full on and full off. The pair is complementary NPN and PNP and well matched, this makes it suitable for the push-pull final stages of mini amps or small motor drivers.

Discretes

1N4148 High Speed Diodes

Tue, 01/10/2024 - 9:53am by deadmin

Resources

The 1N4148 is a standard silicon switching signal diode. Nominal values are Switching Speed 4 ns. Reverse Voltage 100V, Forward Current 200mA, 25nA leakage current. Room Temperature Specs. Package DO-35, DO-204AH. 500mW Power Dissipation. IN914 equivalent..

Datasheets of 1N4148 High Speed Diode.

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Discretes

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