Study of Op-Amp (input-bias current, output-offset voltage & slew rate) with Power Supply Manufacturer,Supplier and Exporter in India
Product Code : SCL-EELE-12318
Indian Lab Suppliers supplies the Study of Op-Amp (input-bias current, output-offset voltage & slew rate) with Power Supply (Product ID: 12318) as part of its electronics engineering lab equipment range. It measures three non-ideal parameters of an IC 741 op-amp: input bias current, output offset voltage and slew rate.
Quick Answer
With both inputs grounded, the small DC output that remains is the output offset voltage, and a potentiometer is provided for adjustment. Two SPDT switches bring resistors into the input paths so that the input bias current can be worked out from the change in output. For slew rate, a square wave from a sine/square oscillator is applied and the slope of the output edge (in V/µs) is measured on a 20 MHz CRO; a 741 slews far more slowly than the input step. A 3¾-digit DMM and AC millivoltmeter complete the extra apparatus. The board runs from a ±12 V DC, 100 mA IC-regulated supply.
Key Specifications
| Parameter | Detail |
|---|---|
| Experiments | Input bias current; output offset voltage; slew rate |
| Op-amp | IC 741 |
| Controls | Two SPDT switches; potentiometer |
| Supply | ±12 V DC at 100 mA, IC regulated |
| Mains | 230 V ±10%, 50 Hz AC; ON/OFF switch, fuse and indicator lamp |
| Also required (not included) | Sine/square oscillator, 3¾-digit DMM, AC millivoltmeter, 20 MHz CRO |
Where This Is Used
Used in op-amp characterisation practicals. Related: OP-AMP Parameters with power supply and 1 dual range meter (Product ID: 12207) and Study of Inverting & Non-inverting Operational Amplifier with power supply (Product ID: 12263). Browse the full Electronics Engineering Lab Equipment range or related Electronics Lab Equipment products.
Frequently Asked Questions
How is slew rate measured?
From the slope of the output edge when a square wave is applied, viewed on a CRO.
What are the SPDT switches for?
Switching resistors into the inputs to find the bias current.
Which op-amp is tested?
An IC 741.
Related Categories
Electronics Engineering Lab Equipment · Electronics Lab Equipment · Engineering Lab Equipment
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