Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronic 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

Differential to single converter

Status
Not open for further replies.

noiseless

Full Member level 3
Joined
May 24, 2005
Messages
172
Helped
15
Reputation
30
Reaction score
6
Trophy points
1,298
Activity points
2,495
I tried to use single stage OTA to realize differential to single conversion. The block diagram is shown in Fig. 1 and the OTA schematic is shown in Fig. 2.
The Vo relates to the input signal is as
Vo = Vinp – Vinn
In order the input impedance is the same, C2 is chosed to be 2*C1. However, I found the s11 (Fig. 3) is still different and the Vinp is still 2 dB higher than Vinn. The circuit is operated at 2.5GHz.
What is the reason?
 

Status
Not open for further replies.

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Top