Comparative Study of Bridge Rectifier and Precision Rectifier (using OP-AMP) with power supply and 1 meter Manufacturer,Supplier and Exporter in India
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Product Code : SCL-EELE-12272
Indian Lab Suppliers supplies the Comparative Study of Bridge Rectifier and Precision Rectifier (using OP-AMP) with power supply and 1 meter (Product ID: 12272) as part of its electronics engineering lab equipment range. It compares a diode bridge rectifier with an op-amp precision rectifier on small AC signals.
Quick Answer
A diode bridge cannot rectify the part of the signal below its diode cut-in voltage (about 0.6-0.7 V for silicon, twice that across a bridge), so small inputs come out distorted. The board feeds the same 5 V p-p or 10 V p-p, 50 Hz signal to a bridge rectifier and to a precision rectifier built on IC 741 op-amps, where feedback removes the cut-in effect, and the outputs are compared on a 20 MHz CRO. It has three IC 741s, a ±15 V DC (50 mA) supply wired internally, a 0-10 V DC (50 mA) variable supply and a 0-15 V DC voltmeter.
Key Specifications
| Parameter | Detail |
|---|---|
| Experiment | Full-wave rectification of low-level signals: bridge vs precision rectifier |
| AC test signals | 5 V p-p and 10 V p-p fixed, 50 Hz |
| Op-amps | 3 x IC 741 |
| Supplies | ±15 V DC at 50 mA (internal); 0-10 V DC at 50 mA, variable |
| Meter | DC voltmeter 0-15 V, 65 mm rectangular dial |
| Mains | 230 V ±10%, 50 Hz AC; ON/OFF switch, fuse and indicator lamp |
| Also required (not included) | 20 MHz CRO |
Where This Is Used
Used in op-amp and power-supply practicals. Related: Junction Diode Rectifier & Filter Characteristics with power supply and 2 meters (Product ID: 12195) and Rectifier Trainer (Product ID: 12101). Browse the full Electronics Engineering Lab Equipment range or related Electronics Lab Equipment products.
Frequently Asked Questions
Why does a bridge rectifier fail on small signals?
Two diodes conduct in series, so the input must exceed about twice the diode cut-in voltage.
How does the precision rectifier avoid this?
The op-amp gain inside the feedback loop cancels the diode drop.
What else is needed?
A 20 MHz CRO to view the waveforms.
Related Categories
Electronics Engineering Lab Equipment · Electronics Lab Equipment · Engineering Lab Equipment
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