Hi guys. I'm not really good at designing a circuit but I desperately need a design that can output 20VAC and 200Hz sinewave signal to be used for another laboratory work. Could you please recommend me schematics since I do have a background in reading and making circuit boards. thank you so much. Hope that someone could help me.
Hi Jonah,
Welcome to the ETO. Care to put Philippines, next to 'Location' on your user page so that it displays in the box at the left of your posts.
You haven't told us what you would like to drive with the signal generator, so I have made a couple of assumption and have knocked up a circuit.
The thing is, we do not know what components you can access, so here is a list of components that would be required:
(1) 70V DC at 500mA power supply (buy or make)
(2) Transistor NPN power: TIP 35, 2N3055, TIP3055, etc
(3) Heatsink for power transistor
(4) 15W 10 Ohm resistor
(5) 50 Ohm 20W resistor
(6) Voltage regulator, high voltage: TL873
(7) Dual operational amplifier; LM358
(8) Junction field effect transistor (JFET): 2N3819 etc
(9) Capacitors; various
(10) Resistors: various, 0.25 Watt or higher, 5% or better, metal film, or metal oxide
(11) Case
(12) BNC chassis mount socket
(13) prototype printed circuit board (PCB)
Let me know what you think
spec