Continue to Site

Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Register Log in

[Questions] ADS simulation on FM TX circuit

Status
Not open for further replies.
O

oasis4355

Member level 3
Joined
Feb 28, 2006
Messages
67
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,286
Activity points
1,801
Hi all,

i'm draw the this circuit using ADS, refering to the schemetics. I've simulated it and everything is working fine, the frequency changes when the input voltage changes. However, I have a few questions about the circuit.

9_1172953130.JPG


1, What's the function of C8 and R1 (base of the oscillator)? Is it just a coupling capacitor?

2, How can I show that the frequency changes with voltage (in one graph, X=freq, Y=voltage). Currently, i change the value of the input voltage and simulate the whole thing again. I try using parameter sweep but have error in simulation. Can someone advice me?

52_1172953537.JPG


12_1172953700.JPG


Thanks in advance

Alex
 

Status
Not open for further replies.

Similar threads

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top