# Tagged Questions

399 views

### Make a symmetrical power supply with a single power source

I need to read a strain gauge with some opamps. To keep the project simple, I wanted to power it with a single battery. I need to power the strain gauge with 10V, so my battery is going to be more ...
150 views

### Voltage Controlled Oscillators

I want to know how to calculate the gain of a VCO. I've looked online and see that there exists a formula $$K_{VCO} = \dfrac{f_1-f_2}{V_1-V_2}$$ but it would seem that this result would give ...
753 views

### Power supply with opamp and BJT transistor

I am studying for my EE exam but I couldn't quite get how this circuit works. Source Assume R1 = R2, Vout = 10V Vref = 5v. This is stable as it is, and when Vout decreases for a reason below 10V, ...
560 views

### Current regulation - oscillation problems

I'm playing around with opamps trying to build power supply for lead acid battery charger, but in general i want to learn a bit about opamp based design. I'm stuck with constant current mode. I'm ...
122 views

### THS6002 “Dual Differential Line Drivers and Receivers”. Output: 15 MHz

I made ​​a PCB with the THS6002 chip "Dual Differential Line Drivers and Receivers". I copied the application example of figure 59 in the datasheet (page: 34), with three differences: the transformer ...
876 views

### Need help with use of LM358, microcontroller and +/- power supply

I have signal in 0-5V range and would like to amplify it to 0-10V. For that I am using LM358, but I have a bit of trouble with that. I have naively designed the circuit like so: I tried to supply ...
849 views

### Can I use a voltage divider and/or voltage follower to produce 1V from 9V for an op-amp oscillator?

For a circuit I'm building, I'm using an op-amp oscillator to generate a sine wave. The sine wave will have a maximum voltage of 1V and a minimum voltage of -1V. The circuit will be powered by a 9V ...
1k views

### Relationship between PSRR and gain

Wikipedia says that power supply rejection ratio (PSRR) is the ratio of output noise referred to the input vs noise at the power supply: The PSRR is defined as the ratio of the change in supply ...
2k views

### OpAmps - Single Supply or Dual?

I'm trying to pick an op-amp and I'm having trouble figuring out if the op-amp needs a positive and a negative power supply or if I can connect it to ground and the positive supply. What do I need to ...