This thread has been locked.
If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.
Part Number: LM7171
V1 is DC for Vf=1V, V2 is sine wave of Vpp=2V, the low V2=0V,The High V2=2V, The V spuppler power is ±15V， but when the frequency is 20Mhz Vout is only -7V to +7V，I think its should be -10V to + 10V
Well it is a voltage feedback device, say it is 200MHz GBP, your 2nd stage is at a noise gain of 11, should be about 18MHz F-3dB for small or large signal - you just rolling off. If you need gain of 10 and 20Mhz, use a current feedback 2nd stage.
We are glad that we were able to resolve this issue, and will now proceed to close this thread.
If you have further questions related to this thread, you may click "Ask a related question" below. The newly created question will be automatically linked to this question.
In reply to Michael Steffes:
Can you provide a reference schematic? Thank you very much!!!
In reply to user5840537:
Here are two TINA-TI schematics with the initial design you posted and one using a current-feedback amp (THS3091) on the second stage. You can choose a different amplifier based off your requirements, a current feedback amplifier is useful in high gain configurations since it's bandwidth isn't greatly affected by gain. If you choose to use a voltage-feedback amplifier, you will need a part with a greater gain-bandwidth than the LM7171 (at least 220MHZ in this case). You can take a look at this video series for more info on current feedback amplifiers.
All content and materials on this site are provided "as is". TI and its respective suppliers and providers of content make no representations about the suitability of these materials for any purpose and disclaim all warranties and conditions with regard to these materials, including but not limited to all implied warranties and conditions of merchantability, fitness for a particular purpose, title and non-infringement of any third party intellectual property right. No license, either express or implied, by estoppel or otherwise, is granted by TI. Use of the information on this site may require a license from a third party, or a license from TI.
TI is a global semiconductor design and manufacturing company. Innovate with 100,000+ analog ICs andembedded processors, along with software, tools and the industry’s largest sales/support staff.