moein_peerooz
Newbie level 3
- Joined
- Jan 29, 2012
- Messages
- 3
- Helped
- 0
- Reputation
- 0
- Reaction score
- 0
- Trophy points
- 1,281
- Activity points
- 1,299
dear friends
I have designed class F power amplifier based on TSMC 0.18um Technology using stacked structure.
but when i peak third harmonic traping circuit, the output of circuit in 4.7GHz(center freq) have a negative real impedance!!!
Is there any techniques to overcome this problem ?
Of course, I know the seris resistor could solve this problem; but the efficiency comes down!
I have designed class F power amplifier based on TSMC 0.18um Technology using stacked structure.
but when i peak third harmonic traping circuit, the output of circuit in 4.7GHz(center freq) have a negative real impedance!!!
Is there any techniques to overcome this problem ?
Of course, I know the seris resistor could solve this problem; but the efficiency comes down!