FET Characteristics Apparatus
Product Code : SCL-EAE-11324
Quick answer: The FET Characteristics Apparatus is used to plot the output (drain) and transfer characteristics of a field-effect transistor by measuring drain current while the drain-source and gate-source voltages are varied. It shows students how a voltage-controlled device differs from a bipolar transistor. Lab Exports manufactures it in Delhi for schools, colleges and universities.
Specifications
| Parameter | Detail |
|---|---|
| Device studied | Field-effect transistor (FET) |
| Apparatus type | Semiconductor characteristics laboratory apparatus |
| Principal measurements | Drain current ID, drain-source voltage VDS and gate-source voltage VGS |
| Primary experiments | Output (drain) characteristics and transfer characteristics |
| Brand | Lab Exports |
The FET type and polarity fitted to the apparatus are confirmed with each quotation.
How the FET characteristics experiment is done
In a field-effect transistor the current between drain and source is controlled by the electric field set up by the gate voltage, while the gate itself draws almost no current. Two families of curves describe the device: the output (drain) characteristics, ID against VDS at fixed VGS, and the transfer characteristic, ID against VGS at fixed VDS.
From these curves students identify the ohmic region at low VDS and the saturation region where ID changes little with VDS, and they estimate the drain resistance rd = delta VDS / delta ID and the transconductance gm = delta ID / delta VGS.
- Identify the gate, drain and source terminals shown on the apparatus and set both supplies to zero.
- Set VGS to a chosen value and increase VDS in steps, recording ID at each step.
- Repeat the readings for several VGS values to obtain a family of output curves.
- Hold VDS constant in the saturation region and vary VGS, recording ID for the transfer curve.
- Plot the graphs and calculate drain resistance and transconductance from their slopes.
Key features
- Measures drain current against drain-source and gate-source voltage for a full characteristic study
- Output curves are recorded at selected gate-source voltage values
- Transfer-curve analysis links gate voltage directly to drain current
- Illustrates voltage-controlled operation in contrast with the current-controlled bipolar transistor
- Readings tabulate and plot cleanly for graph-based evaluation in repeated practicals
Documentation and supply
Most Lab Exports products carry a one-year manufacturer warranty.
Lab Exports manufactures the FET Characteristics Apparatus at its works in Laxmi Nagar, Delhi, and supplies it to schools, colleges and universities in India and 60+ countries, handling the export documents for each shipment. More about the company is on the About Lab Exports page.
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The full range is in the Electrical and Electronics section of the Physics Lab range.
Frequently asked questions
What graphs are plotted with the FET characteristics apparatus?
The output (drain) characteristics, ID against VDS for several gate-source voltages, and the transfer characteristic, ID against VGS at a constant VDS.
How is transconductance found in the FET experiment?
From the transfer curve: gm is the change in drain current divided by the change in gate-source voltage, measured at a fixed drain-source voltage.
What is the price of the FET Characteristics Apparatus?
Prices are not published on the website. Add the FET Characteristics Apparatus to the Enquiry Cart with the Add To Cart button on this page, or email [email protected] with the house code SCL-EAE-11324 and the quantity, to receive a quotation.
Does Lab Exports manufacture the FET Characteristics Apparatus?
Yes. Lab Exports manufactures the FET Characteristics Apparatus at its works at 11/315, Lalita Park, Laxmi Nagar, Delhi 110092, under house code SCL-EAE-11324.
Request a quote
Email [email protected] with the house code SCL-EAE-11324 and the quantity, or add the FET Characteristics Apparatus to the Enquiry Cart with the Add To Cart button on this page. Tender buyers can also see the Tenders and OEM page.
