Video amplifier [2] circuit | Next Electronics

Several operational amplifier circuits are presented here, configured as square wave oscillators. A square wave is a periodic pulse train with a 50 percent duty cycle. The operational amplifier functions as a high-gain amplifier, and oscillation is achieved with minimal...

Alternately flashing lights chain multiple sets of high-power circuit 2

The transistors VTi, VT3, and VTs, along with the RC components, form three distinct multi-resonator oscillators. The oscillation frequency levels are dependent on the values of Ri, R3, Rs, and Cl, as well as Cz and C3s. The circuit comprises three...

Capacitive load driver

The circuit utilizes a 100-ohm isolation resistor that allows the amplifier to drive capacitive loads greater than 500 pF. This resistor effectively isolates high-frequency feedback from the load, contributing to circuit stability. Low-frequency feedback is returned to the amplifier's summing...

Single op amp oscillator

This circuit incorporates a Schmitt trigger and an integrator configured around a single operational amplifier (op-amp). The timing is regulated by an RC network. The voltage at the inverting input tracks the exponential charging of the capacitor within defined upper...

Filtered-sample-and-hold

It is often necessary to filter a signal prior to sampling. This can be achieved using a single device. Any of the inverting or non-inverting filters that can be constructed with operational amplifiers (op-amps) may be utilized. However, it is...

Capacitor Allows Higher Slew Rates

In this circuit, a Burr-Brown operational amplifier provides a slew rate of 135 V/μs. The inclusion of capacitor C2 reduces the high-frequency feedback factor to less than unity, enabling higher slew-rate amplifiers to be compensated for gains greater than one. This...

Simple Square wave Generator using transistors ~ Easy Electronics

A useful feature of this circuit is that the frequency can be changed by modifying the capacitor value. A switch can be added to select between various frequencies. This circuit utilizes a capacitor in conjunction with an oscillator to determine its...

transistors Mystery circuit: latching relay control with transitor / capacitor why doesnt it work

A single-coil latching relay is utilized, which can latch and reset with opposite polarities. Testing of the circuit with dual opposite-biased LEDs showed no flickering in either direction, indicating stable charge and discharge behavior. However, there are concerns regarding the...

Fast Video Signal Amplitude Measurer Circuit

The amplitude of a video signal can be measured using a straightforward circuit that functions as a modified standard peak detector. This device is capable of verifying RGB signals produced by video RAMDACs. U1 is a high-speed buffer, while U2...