I am working on developing a unity gain wideband differential amplifier (10kHz-1GHz). Any suggestions on available op-amp devices in the market working for this range?
I have tried to implement with OPA847, with the following circuit. but it won't work as expected. I need to change all resistors to make it work for different frequencies in the application range. what could be the reason for it? how I can resolve this issue?
I am trying to evaluate with TINA-TI software. I am at beginner level for analog ciecuit design.



Any help would be appreciated.

Thank you.

 

it won't work as expected.

What is it doing? What do you think it should do? What is wrong?

 

I am working on developing a unity gain wideband differential amplifier (10kHz-1GHz).

I am at beginner level for analog ciecuit design.

Nothing in electronics that has a G in it (gigaohm, gigavolt, gigawatt, gigahertz, giga-etc.) can be rearranged to spell "beginner". Beyond what this does to physically assembling a circuit, there are very few components that will do what you want. The part you mention is not characterized for operaton at 1 GHz. Its GBW is only 3 GHz, meaning that at 1 G there will be relatively little common mode rejection at the input. Also, any waveshape other than a sine wave will be distorted due to suppression of harmonics and frequency-dependent phase shifts.

What is this for? What are you trying to achieve. With more information, we might be able to recommend something.

ak

 

I am working on the directional coupler in the range 10kHz-1GHz. With the mentioned part I am trying to implement an active directional coupler with a Wheatstone bridge circuit. Any suggestions for the design?

 

Your power supply is +1 5V and -2 5V. What is that? Is it +1.5V and -2.5V? The minimum shown on the datasheet is +5V and -5V because its inputs do not work within 1.9V from its positive supply.
It is designed for a minimum gain of 20 but the datasheet shows how to fiddle with its with capacitors and resistor values to make less gain.

 

Your power supply is +1 5V and -2 5V.

Nope.

V1 = 5 V, negative to GND
V2 = 5 V, positive to GND

ak

 

directional coupler with a Wheatstone bridge circuit

Please post your circuit.

 

Why do people post schematics that are covered with polka dots or a grid?

 

Why do people post schematics that are covered with polka dots or a grid?

Because many of us run the "grid" turned on.
Why do people have Ground pointing up in the air?

 

Screen capture? Settings? Whatever . . .

Why do people look at a grid and assume that two of the dots, perfectly aligned in the pattern, are in fact decimal points, even thought the size, color, and position are wrong?

ak

 

I have found one solution by ADC5920 but I am not sure if it is capable of vector S-parameter measurements (It is capable of measuring RMS of forward and reverse signal). can anyone suggest if ADC5920 is capable of delivering time-domain IV measurement capacity?