Melfior_Ra
New Member
Hi everyone!
First of all please excuse my english.
I started to study by myself, as hobby, electronics. Now i am trying to figure out how oscillators work. The classic example, the LC tank, the one with a capacitor charged first by a dc power supply and then put in circuit with a inductor it is easy to understand. But in practice (Colpitts osc.) for me it's almost impossible to catch the trick.
In the circuit attached, the capacitor is charging through the resistance. First, the courent that flows through capacitor is at maximum value, and as the cap. gets charged become smaller. The voltage across capacitor starts to rise. At some point a courent starts to flow through the inductor. The voltage rise and at some value the capacitor starts to discharge through the inductor. What is causing this discharge?
Thank you in advance!!
First of all please excuse my english.
I started to study by myself, as hobby, electronics. Now i am trying to figure out how oscillators work. The classic example, the LC tank, the one with a capacitor charged first by a dc power supply and then put in circuit with a inductor it is easy to understand. But in practice (Colpitts osc.) for me it's almost impossible to catch the trick.
In the circuit attached, the capacitor is charging through the resistance. First, the courent that flows through capacitor is at maximum value, and as the cap. gets charged become smaller. The voltage across capacitor starts to rise. At some point a courent starts to flow through the inductor. The voltage rise and at some value the capacitor starts to discharge through the inductor. What is causing this discharge?
Thank you in advance!!