Differential oscillator operation details - Page 2

Do you have a question? Post it now! No Registration Necessary

Translate This Thread From English to

Threaded View
Re: Differential oscillator operation details
On 3/29/2019 5:11 PM, Clifford Heath wrote:

Quoted text here. Click to load it

Yes, it oscillates. Thank you.

Re: Differential oscillator operation details
On 3/28/19 1:38 PM, snipped-for-privacy@gmail.com wrote:
Quoted text here. Click to load it

The cross-coupled pair is just a negative resistance. It's i-v curve
is something like this:

           ^i
           |         *
    *******|        *
   *       *-------*-----> v
  *         *******
*

Place a parallel LC across it and the negative conductance cancels out  
the tank's losses and it starts oscillating. Of course the  
nonlinearities play a significant role, but the basics are these.

Any oscillator can be analyzed as a negative-resistance + resonator or  
unit-gain feedback loop. Some structures are more intuitive from one  
point of view others from the other. The cross-coupled oscillator is  
intuitive from the negative-resistance pov.

Pere

Site Timeline