Can Any IC Handle V0 = V1 + V2 - (V3 + V4) Regardless of Voltage Polarity?

Ben is looking for an IC that can perform a specific calculation and has certain criteria, such as a dual supply operation and the ability to handle a range of inputs. He mentions finding the LM324, but it does not meet his requirements. Bob suggests using an opamp made for dual supply operation. In summary, Ben is looking for an IC that can perform a calculation with specific criteria. He has found the LM324 but it does not meet his requirements. Bob suggests using an opamp made for dual supply operation.
  • #1
Poptart
5
0
Hi,

I've been having a bit of trouble finding a summer IC that can perform the following calculation:

V0 = V1 + V2 - (V3 + V4)

I found the LM324 which includes that calculation in its documentation, but it requires V1 + V2 > V3 + V4 since it's only got V+ and GND inputs. This requirement is a deal-breaker since my possible V0 can be either positive or negative.

In my circuit, V1-4 all can range from 0 to 100 mV. Does anyone know of a specific IC that would be able to meet these criteria?

Thanks for the help,
-Ben
 
Engineering news on Phys.org
  • #2
You can bias everything up by a known amount, or use pretty much any opamp made for dual supply operation. The good old 741, or any of the TL08x series come to mind.
 
  • #3
You will get the best results if you sum only on the inverting inputs. U3 in the thumbnail is a standard differential amplifier configuration.

Bob S
 

Attachments

  • OP_Amp_Summer.jpg
    OP_Amp_Summer.jpg
    21.9 KB · Views: 416

Related to Can Any IC Handle V0 = V1 + V2 - (V3 + V4) Regardless of Voltage Polarity?

What is an IC?

An IC, or integrated circuit, is a small electronic device that contains multiple interconnected components, such as transistors, resistors, and capacitors, on a single chip. These components work together to perform specific functions, such as amplification or logic operations.

What are analog calculations?

Analog calculations involve using continuous signals, such as voltage or current, to perform mathematical operations. These calculations are typically done using analog circuits, which use components such as resistors, capacitors, and transistors to manipulate the signals and produce an output.

How do ICs perform analog calculations?

ICs can perform analog calculations by using a combination of analog and digital circuits. The analog portion of the IC manipulates the input signals, while the digital portion handles the logic and decision-making processes. This allows for more precise and efficient calculations compared to using analog circuits alone.

What are the advantages of using ICs for analog calculations?

ICs offer several advantages for analog calculations, including smaller size, lower power consumption, and higher precision. They also allow for easier integration into larger electronic systems and can be mass-produced at a lower cost compared to discrete analog components.

What are some common applications of ICs for analog calculations?

ICs are used in a wide range of applications that require analog calculations, such as audio amplifiers, voltage regulators, and signal processing circuits. They are also commonly used in measurement and control systems, such as temperature sensors and motor controllers.

Hot Threads

Recent Insights

Back
Top