Seeking an analog buffer capable of delivering in excess of 2V p-p to a 100 ohm load

arthur williams73

Intellectual 390 points

I am seeking an analog buffer (unity gain) capable of delivering in excess of 2V p-p to a 100 ohm load.

over 6 years ago

0 Bala Ravi over 6 years ago

TI__Expert 6625 points

Hi Arthur,
Are you looking for an op-amp suggestion or a buffer circuit design recommendation?

Please check out our cookbook for a voltage follower circuit and op-amp recommendation: www.ti.com/.../slyy137.pdf
(Page 5 for Voltage follower circuit)

Best Regards,
Bala Ravi

0 Ron Michallick over 6 years ago

TI__Guru*** 143776 points

Arthur,

Can we pick power supply bus values or do you already have power sources selected?
What is the maximum frequency needed? Can the DC value be discarded or must it be saved?
In what priority order are these factors; cost, size, component count?

0 arthur williams73 over 6 years ago in reply to Bala Ravi

Intellectual 390 points

I left out that the frequency range is from 20KHz to 1GHz

0 arthur williams73 over 6 years ago in reply to Ron Michallick

Intellectual 390 points

Supply voltage can be any value. I left out that the frequency range is from 30KHz to 1GHz.

0 Ron Michallick over 6 years ago in reply to arthur williams73

TI__Guru*** 143776 points

Arthur

1GHz changes everything.

Start looking here. www.ti.com/.../products.html
When you find a device you like, post a new question using that part number, so the appropriate engineer will respond.

Generic questions without a part number are assigned to general purpose amplifiers devices that have a gain bandwidth less than 50MHz

0 arthur williams73 over 6 years ago in reply to Ron Michallick

Intellectual 390 points

The problem is some MMIC amplifiers use an RF Choke but to cover a band from lets say 50KHz to 1GHz no single choke would work as a large inductance value is needed for the lower frequencies but that implies a low self resonant frequency. so no single choke would cover the entire band.

0 arthur williams73 over 6 years ago in reply to Ron Michallick

Intellectual 390 points

Hi Ron

The problem is all these RF Gain blocks require an inductor for a shunt feed of power. A single inductor can not cover my range from below 100KHz to 1GHz due to self resonances.

Arthur

0 Ron Michallick over 6 years ago in reply to arthur williams73

TI__Guru*** 143776 points

Arthur,

I started this related thread. e2e.ti.com/.../712539
While it is not a direct path to a solution, it will get to an engineer that should know how to solve this application challenge.

If that thread helps, please mark both threads as answered. Thanks!

RF & microwave

RF & microwave forum

Seeking an analog buffer capable of delivering in excess of 2V p-p to a 100 ohm load