Opamp Supply on Buffered Virtual Ground
When a Inverting Opamp Configuration is at a steady state, we say the Inverting Input is at a Virtual Ground. That means it is at 0V w.r.t to the dual power supply ground, but...
Category: Opamp-Circuits
InfraRed Detector for Proximity Switch
The proximity switch can work for a wide range of power, from 8v to 18v DC, D3 protects reverse power supply connections, and U1 regulates the supply to +5v , -5v is derived from...
Precision Op-Amp Current Source
In this circuit we tackle the error indicated in the earlier Current Source. The LM336-2.5V eliminates the tiny error of the regulated supply and resistors. Thereby increasing Precision to a higher degree.
Dual Polarity Analog Output Op-Amps
When you have to buffer and invert the polarity of mV input levels. This is the circuit you can use, as OP07 has uV offset. R9 and R10 can be 100K 1{22ca7e5750adbf65450bc4cf6e82790400f3c203d9ecc808a4bc035087435d3d} MFR or...
Analog PID control using OpAmps
The Measured Value and The Setpoint are two inputs to a Control System. The Measured Value is the Amplified input of a Transducer or Sensor for some Parameter that needs to be controlled. It...
Non-Inverting Amplifier – Op-Amp Circuits
The input impedance of this module is very high, if U1 is OP07 it is in mega ohms, use CA3140 or LF356 fet input opamps to get 1 tera ohm input impedance, but for...
Diode Reverse Bias Leakage Tester
This is a Test arrangement for Leakage Testing of Diodes on Reverse Bias. The leakage current indicates the ability of the diode to withstand higher voltages. An AutoTransformer or Variac can be used to...
Square and Triangle Opamp Oscillator
Here is the circuit of a Op-Amp based Square Wave Generator. One of the main application of this is in a Simple PWM circuit and Triangle Opamp Oscillator. The Slope of the Triangle wave...
Digital gain control of Opamp.
The gain of U1 can be controlled by a digital binary 1248 nibble at ABC. The gain at digital 000 is unity or 1 and the gain at various stages are set by 4051....
Linearizing Circuit for Thermocouples
This circuit changes the gain of opamp U1B in four steps or segments. It can be used to get a linear output from most transducers to 1{22ca7e5750adbf65450bc4cf6e82790400f3c203d9ecc808a4bc035087435d3d} levels.U1A is a amplifying buffer use it...
Analog Level by BCD Thumbwheel Switch
BCD Thumbwheel Switch is used to input-set data in digital form, this can be read by digital circuits, uC and uP systems and PLC-SCADA Interfaces. Temperature Measurement and Control In the early transition of...
Battery Level LED Indicator
This LED Indicator uses a LM339, a quad comparator. LM339 can work on single or dual supplies, it has a open collector output that can drive 15mA, low power consumption. The circuit is an...
