J Jony130 Active Member Feb 1, 2011 #1 Hi, can you suggest any simply diagram of a BJT astable generator, supply from 3V and capable to gen wave from range 500KHz to 2MHz.
Hi, can you suggest any simply diagram of a BJT astable generator, supply from 3V and capable to gen wave from range 500KHz to 2MHz.
B BrownOut Banned Feb 1, 2011 #2 Hi Jony130, Are you looking for an astable multivibrator? Does it have to be strictly BJT's? Does it need to be continusously adjustable? What's wrong with the classic multivibrator? There must be hundreds of schematics avaliable.
Hi Jony130, Are you looking for an astable multivibrator? Does it have to be strictly BJT's? Does it need to be continusously adjustable? What's wrong with the classic multivibrator? There must be hundreds of schematics avaliable.
J Jony130 Active Member Feb 2, 2011 #3 Does it have to be strictly BJT's? Click to expand... Yes Does it need to be continusously adjustable? Click to expand... No What's wrong with the classic multivibrator? Click to expand... Two capacitors or two resistor is needed to be change if I want change the frequency. Anyone have an idea how to "force" this circuit to work up to 2MHz **broken link removed**
Does it have to be strictly BJT's? Click to expand... Yes Does it need to be continusously adjustable? Click to expand... No What's wrong with the classic multivibrator? Click to expand... Two capacitors or two resistor is needed to be change if I want change the frequency. Anyone have an idea how to "force" this circuit to work up to 2MHz **broken link removed**
ericgibbs Well-Known Member Most Helpful Member Feb 2, 2011 #4 hi, This is in LTS spice simulation. In an actual circuit layout would be critical Attachments 000esp04.gif 40.3 KB · Views: 193 000esp05.gif 42.2 KB · Views: 171
B BrownOut Banned Feb 22, 2011 #5 Hi Jony130. Here's a two transistor solution. It'll take a little fiddling with R8 to get it to work. EDIT: Here is the 3V version Attachments 2_tran_osc_3vv.JPG 87.7 KB · Views: 165 Last edited: Feb 23, 2011
Hi Jony130. Here's a two transistor solution. It'll take a little fiddling with R8 to get it to work. EDIT: Here is the 3V version