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simple 12db/octave filter – Circuit Schematic
simple 12db/octave filter
This is a 9vdc powered LM13700 dual transconductance op-amp based filter very suitable for battery powered circuits. The design is based on an article by R. A. ...
Active Filters – Circuit Schematic
Active Filters
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Active Filters – Circuit Schematic
Active Filters
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Micropower Dual Single Supply Precision Op Amp – Circuit Schematic
Micropower Dual Single Supply Precision Op Amp
The RH1078M is a micropower dual op amp in the standard 8-pin configuration. This device is optimized for single supply operation at 5V. Specifications for ±15...
Voltage follower – Circuit Schematic
Voltage follower
Beware that not all transistors share the same terminal designations, or pinouts, even if they share the same physical appearance. This will dictate how you con...
The instrumentation amplifier – Circuit Schematic
The instrumentation amplifier
As suggested before, it is beneficial to be able to adjust the gain of the amplifier circuit without having to change more than one resistor value, as is necess...
HQ Notch Filter Without Close-Tolerance components – Circuit Schematic
HQ Notch Filter Without Close-Tolerance components
A notch for a narrow frequency band of a few per cent or even less normally requires close-tolerance components. At least, that`s what we thought until we came ...
Fast Voltage-Driven Current Source – Circuit Schematic
Fast Voltage-Driven Current Source
The current source in the diagram, which react very fast to changes in the input signal, may be used, for instance, in certain measurements. Differential amplif...
Connection Tester – Circuit Schematic
Connection Tester
This simple circuit uses a 741 op-amp in differential mode as a continuity tester. The voltage difference between the non-inverting and inverting inputs is ampl...
Operational Amplifier Voltage Comparator Circuits – Circuit Schematic
Operational Amplifier Voltage Comparator Circuits
A voltage comparator is a device that compares the voltage at the two inputs and develops an output based on the inputs. A high output when the plus input is gr...
Op-Amp Pulse Generator Circuits – Circuit Schematic
Op-Amp Pulse Generator Circuits
A number of operational amplifier circuits are provided here that are set up to be squarewave oscillators. A squarewave is a Periodic Wave pulse train with a 50...
Schmitt Trigger VU Meter – Circuit Schematic
Schmitt Trigger VU Meter
If you look carefully at the schematic you will notice the input is feed into the voltage divider. This is because the Schmitt Triggers all turn on a.....
Industrial & Domestic Electronic Kits – Circuit Schematic
Industrial & Domestic Electronic Kits
This is a very simple and inexpensive circuit uses an operational amplifier IC 741 (IC1) and push-pull amplifier using transistors for amplification of a signal...
Current-to-Voltage Converter – Circuit Schematic
Current-to-Voltage Converter
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LF353 JFET-INPUTDUAL OPERATIONAL AMPLIFIER – Circuit Schematic
LF353 JFET-INPUTDUAL OPERATIONAL AMPLIFIER
This article describes the Low dropout voltage regulators circuits (LF353DRG4). The content is very simple, very helpful. Components in this article can help yo...
How to build 2nd Order Opamp Filters – Circuit Schematic
How to build 2nd Order Opamp Filters
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BiQuad Filter Circuit Diagram using LM3403 Quad Op Amp – Circuit Schematic
BiQuad Filter Circuit Diagram using LM3403 Quad Op Amp
This LM3403 op amp family including LM3303 known to be a monolithic quad op amp which have high gain, a compensated internal frequency that will assure a wide r...
Connection Tester – Circuit Schematic
Connection Tester
This simple circuit uses a 741 op-amp in differential mode as a continuity tester. The voltage difference between the non-inverting and inverting inputs is ampl...
Operational Amplifier (Op Amps) Circuits – Circuit Schematic
Operational Amplifier (Op Amps) Circuits
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Single Op-Amp Bandpass Filter circuit – Circuit Schematic
Single Op-Amp Bandpass Filter circuit
A bandpass filter passes a range of frequencies while rejecting frequencies outside the upper and lower limits of the passband. The range of frequencies to be p...