Unipolar to Bipolar Converter Example
If you need to design a differential amplifier, here is a handy calculator. All you need to define are the input range, the output range and a choice of a voltage reference.
The differential amplifier was explained in different articles on this website. Solving the Differential Amplifier – Part 1, Part 2 and Part 3 shows a numerical example and how to design such an amplifier. Also, the common mode voltage level and the common mode output error were explained in the series of articles The Differential Amplifier Common-Mode Error – Part 1 and Part 2.
Enter the input range, Vin1 to Vin2, the output range, Vout1 to Vout2 and a reference voltage Vref. You need to choose two resistors, R2 and R3. The calculator will compute R1 and R4.
Given Input Range
| Vin1 = | V | Vin2 = | V |
Required Output Range
| Vout1 = | V | Vout2 = | V |
Choose a Reference Voltage
| V2 = | V |
Choose R2 and R3
| R2 = | kOhm | R3 = | kOhm |
Calculate R1 and R4
| R1 = | kOhm | R4 = | kOhm |
The default values for this calculator are set for a unipolar to bipolar converter. An explanation of this circuit and another example can be found in Design a Unipolar to Bipolar Converter for a Unipolar Voltage Output DAC. This calculator solves a system of 2 equations with 2 unknows, R1 and R4. Such a system will always have a solution, but the solution might not be physically possible. For example, if one of the resistors is negative, you will need to change the input data. Usually, changing the reference voltage will bring the resistors in the positive realm.
Related Articles
- Differential Amplifier Output Common-Mode Voltage Calculator A differential amplifier frequent use is the amplification of the voltage difference between its input signals, while rejecting the common-mode...
- Design a Differential Amplifier the Easy Way with Mathcad For those of you who have Mathcad, designing a differential amplifier is really easy. Let’s say you need to design...
- Summing Amplifier Calculator The calculator solves the summing amplifier resistors based on the input and output voltage range requirements. It is a great...
Related articles by YARP.
Categories: Analog Design, Calculators, Differential Amplifier
