Hi All
I'm making a Theremin for a project and I've tried a few different oscillators and I'm working on a Colpitts to function in the 500KHz range.
I'm using a L1 = 10mH inductor and a cap value of C1 = 10pF C2 = 470pF which gives me a operating frequency of 509KHz.
Now when I try to simulate it on Multisim it flat lines and won't oscillate, I am sure this is due to the gain bandwidth of the transistor not being enough at that frequency. I've had a look on the net and in some books but I can't find a suitable transistor that will oscillate at the frequency. As if I increase the values so that it will oscillate at 1MHz the simulation works fine, so I know the circuit is OK.
Does anyone know of a transistor that will work in that frequency range? 450KHz - 5550KHz
Any help will be greatly appreciated
I'm making a Theremin for a project and I've tried a few different oscillators and I'm working on a Colpitts to function in the 500KHz range.
I'm using a L1 = 10mH inductor and a cap value of C1 = 10pF C2 = 470pF which gives me a operating frequency of 509KHz.
Now when I try to simulate it on Multisim it flat lines and won't oscillate, I am sure this is due to the gain bandwidth of the transistor not being enough at that frequency. I've had a look on the net and in some books but I can't find a suitable transistor that will oscillate at the frequency. As if I increase the values so that it will oscillate at 1MHz the simulation works fine, so I know the circuit is OK.
Does anyone know of a transistor that will work in that frequency range? 450KHz - 5550KHz
Any help will be greatly appreciated
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