Function generator amplification

 P: 2 Hello, How can I increase voltage and current from a function generator and still keep an accurate waveform? I want to provide AC power to an electromagnet but my function generator does not have the power to drive it. Any help will be greatly appreciated. Thanks
 Mentor P: 41,305 You could use an audio amplifier, like you would use to drive a speaker with music. Just be sure that the electromagnet has an input impedance that is compatible with the power amplifier's output impedance and output power handling capability.
 P: 3 can the audio amplifier be used for a pulse with 10Mhz frequency?
 Sci Advisor P: 4,044 Function generator amplification No. Whatever amplifier you use must have a bandwidth at least equal to the bandwidth of the signal. For example, a 10 MHz square wave would only emerge from the amplifier as anything like a square wave if the amplifier had a bandwidth of 100 MHz or better. This is because a square wave consists of the fundamental frequency (10 MHz in this case) plus a large number of odd harmonics. So, the 10 MHz squarewave consists of sinewaves at 10 MHz, 30 MHz, 50 MHz, 70 MHz, 90 MHz etc and all of these have to be amplified and kept in the same proportion to each other as they start with.
 P: 3 Thanks for the prompt reply. So in that case what do you suggest if I want to increase the voltage/current output of my function generator which produces 10MHz pulses??
 Sci Advisor P: 4,044 That depends. How much signal does the function generator give now, and how big do you want the pulses to be? Also, do you want to just amplify the 10 MHz square waves, or do you want to amplify anything that comes out of the function generator at all frequencies?
 P: 3 The signal is upto 10Vp-p. For my use , I use it as a pulse generator with peak voltage 5 and low voltage 0. The pulse duration is 1microsec(100ns pulse on time 900ns pulse off time). My problem with this is that the "current" output is low which I want to amplify. The voltage output is fine but will be great if this can also be doubled. Thanks
 P: 384 Electromagnets are EXTREMELY inductive. What is the inductance of your electromagnet.