I tried hooking up a germanium diode to an amplifier circuit and then to the speaker build it didn't pick up the signal. Do I need a better amplifier to pump the signal up enough to power the speaker?
2007-02-25 11:25:08 · 3 answers · asked by David H 1 in Science & Mathematics ➔ Engineering
A germanium diode has a lower p-n junction voltage drop as compared to a silicon diode's because of a smaller bandgap; but still is a diode which rectifies, rather than conducts, AC waveforms.
The FM frequency should be in the baseband audible range, between about 100 and 15K Hz, and not a modulated version. If this is true you would need to AC couple the signal through a capacitor, not a diode, so you won't load down the source. And you can then amplify it using any of the various audio amplifiers to drive a speaker.
2007-02-25 12:00:38 · answer #1 · answered by sciquest 4 · 0⤊ 0⤋
I believe the germ. diode is for picking up AM wave frequencies.
2007-02-26 00:37:23 · answer #2 · answered by joshnya68 4 · 0⤊ 0⤋
You have to place your ipod or whatever near the radio or speaker somewhere.
2007-02-25 11:27:58 · answer #3 · answered by 573846538 2 · 0⤊ 0⤋