Forum
Forum
Verilog-AMS
Analysis
Modeling
Design
Theory
Welcome, Guest. Please
Login
or
Register.
Please follow the Forum
guidelines
.
Aug 18
th
, 2024, 1:19pm
Home
Help
Search
Login
Register
PM to admin
The Designer's Guide Community Forum
›
Design
›
Analog Design
› biase voltage of opamp in pipelin adc
‹
Previous topic
|
Next topic
›
Pages: 1
biase voltage of opamp in pipelin adc (Read 1339 times)
frankdhz
New Member
Offline
Posts: 6
biase voltage of opamp in pipelin adc
Apr 08
th
, 2009, 7:42am
After changing from sample phase to amplify phase ,the Cs and Cf disconnect from input common voltage of the opamp in the MDAC .
How dose the input DC biase voltage can be sustained during the amplify phase?
Back to top
IP Logged
rf-design
Senior Member
Offline
Reiner Franke
Posts: 165
Germany
Re: biase voltage of opamp in pipelin adc
Reply #1 -
Apr 11
th
, 2009, 2:14am
I could not imagine how the amplifying SC circuit make a floating connection to the opamp inputs.
General the inputs of the opamp must have a specific potential. Otherwise the common mode input voltage drift with a period and more critical the output is undefined. If your SC-circuit does not need the opamp in a phase switch it off.
Please post a schematic.
Back to top
IP Logged
Pages: 1
‹
Previous topic
|
Next topic
›
Forum Jump »
» 10 most recent Posts
» 10 most recent Topics
Design
- RF Design
»» Analog Design
- Mixed-Signal Design
- High-Speed I/O Design
- High-Power Design
- Mixed-Technology Design
Analog Verification
- Analog Functional Verification
- Analog Performance Verification
Measurements
- RF Measurements
- Phase Noise and Jitter Measurements
- Other Measurements
Modeling
- Semiconductor Devices
- Passive Devices
- Behavioral Models
- Transmission Lines and Other Distributed Devices
Design Languages
- Verilog-AMS
- VHDL-AMS
Simulators
- Circuit Simulators
- RF Simulators
- AMS Simulators
- Timing Simulators
- System Simulators
- Logic Simulators
Other CAD Tools
- Entry Tools
- Physical Verification, Extraction and Analysis
- Unmet Needs in Analog CAD
General
- Tech Talk
- News
- Comments and Suggestions
- Opportunities
« Home
‹ Board
The Designer's Guide Community Forum
» Powered by
YaBB 2.2.2
!
YaBB
© 2000-2008. All Rights Reserved.
Copyright 2002-2024
Designer’s Guide Consulting, Inc.
Designer’s Guide
® is a registered trademark of
Designer’s Guide Consulting, Inc.
All rights reserved.
Send comments or questions to
editor@designers-guide.org
. Consider
submitting
a paper or model.