Simple PSU circuit
#PSU
#voltage regulation
#DC power
#transformer
#rectifier
#filter
#linear regulator
#power management
#electronics
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Variable Voltage Regulation
Controlling the output voltage from a regulator can be made variable in three ways:
1. Using a fixed reference zener diode to increase the output by the value of the zener
2. A variable resistor for variable output, note that...
8A positive fixed voltage regulator
The LAS3905 series voltage regulators are integrated circuits (ICs) that incorporate all components required for linear voltage regulation, including safe-area protection, thermal overload protection, and current limiting. The output voltage and tolerance for the various LAS3905 part numbers are illustrated...
Energy losses in modem
A toroidal transformer (2x12V 15VA) is utilized due to its significantly lower energy losses compared to an E-I core transformer, which was employed in the original mains adapter.
The toroidal transformer is a type of transformer that features a doughnut-shaped core...
An automatic voltage regulator circuit
A step-down transformer converts AC 220V to a lower voltage. A diode bridge rectifier and filter capacitor provide a direct current (DC) output, which fluctuates with variations in the grid voltage. A resistive voltage divider is used for sampling. When...
The Q value of the variable notch filter
The double R circuit consists of three resistors and three capacitors, exhibiting substantially symmetrical double passive attenuation characteristics of the filter element with a frequency response range of 0 to 0.2. The parameters are determined as follows: Rz, R3, CL,...
transformer circuit
A static device that couples two circuits to transfer alternating current (AC) from one circuit to another through electromagnetic induction. The current maintains the same frequency but may vary in voltage, phase, or impedance values. A transformer consists of two...
Diodeless Rectifier Circuit
It is well understood that utilizing single-supply operational amplifiers (op amps) can present challenges when implementing simple functions in a bipolar signal environment. Often, this necessitates the use of additional op amps and other electronic components. Considering this, it is...
Twin-T RC Notch Filter
The two T-notch filter can be utilized to block unwanted frequencies or, when incorporated into an operational amplifier, function as a bandpass filter. The notch frequency occurs when the capacitive reactance equals the resistance (Xc = R), and if these...
Low-forward-drop-rectifier-circuit
A TMOS power FET, Q1, and an LM393 comparator provide a high-efficiency rectifier circuit. When voltage V1 exceeds V2, the output of U1 becomes high, and Q1 conducts. Conversely, when V2 exceeds V1, the comparator output becomes low, and Q1...