Firing circuit using Ramp Comparator Scheme with Power Supply Manufacturer,Supplier and Exporter in India
.png)
Product Code : SCL-EELE-12900
Indian Lab Suppliers supplies the Firing circuit using Ramp Comparator Scheme with Power Supply (Product ID: 12900) as part of its electronics engineering lab equipment range. It is a firing circuit for a single-phase converter in which a mains-synchronised ramp is compared with a DC reference voltage to set the firing angle.
Quick Answer
A 6 V AC sample of the supply synchronises a ramp that restarts every half cycle; an op-amp comparator switches when the ramp crosses the reference voltage, and logic gates (quad XOR, triple 3-input AND, hex inverter and quad 2-input AND ICs) shape this edge into gate pulses. Two NPN transistors amplify the pulses into a 1:1 pulse transformer for isolated SCR gate drive. Turning the reference potentiometer moves the firing angle, and the relation between reference and angle is linear. Power comes from built-in 6 V AC and ±12 V DC, 100 mA supplies, and the board runs from 230 V ±10%, 50 Hz mains.
Key Specifications
| Parameter | Detail |
|---|---|
| Scheme | Ramp comparator firing for a single-phase converter |
| ICs | 2 op-amp ICs; quad XOR, triple 3-input AND, hex inverter, quad 2-input AND |
| Output stage | 2 NPN transistors; pulse transformer 1:1 |
| Control | Reference-voltage potentiometer |
| Supplies | 6 V AC, 100 mA; ±12 V DC, 100 mA regulated |
| Mains | 230 V ±10%, 50 Hz; ON/OFF switch, fuse and indicator lamp |
| Connections | 4 mm stackable patch cords, 0.5 m |
Where This Is Used
One of three firing-circuit boards, with the Firing circuit using Cosine-Wave Scheme with Power Supply (Product ID: 12902) and the Firing circuit using Op-Amps and Gates with Power Supply (Product ID: 12901). An oscilloscope is needed to view ramp and pulse waveforms. Browse the full Electronics Engineering Lab Equipment range or related Electronics Lab Equipment products.
Frequently Asked Questions
How is the ramp kept in step with the mains?
It is reset every half cycle by a signal taken from the 6 V AC supply.
What sets the firing angle?
The DC reference voltage, set by the potentiometer.
Is an SCR converter included?
The board provides the firing circuit and isolated gate pulses.
Related Categories
Electronics Engineering Lab Equipment · Electronics Lab Equipment · Engineering Lab Equipment
Request a Quote
For pricing, bulk quantities or tender documentation on the Firing circuit using Ramp Comparator Scheme with Power Supply, reach our team via Contact Us or submit your requirement through our Tenders page.
 trainer (1).jpeg)
.jpg)
.png)
.png)
.jpeg)