Electrical4U What is a T Flip Flop? A T flip-flop (toggle flip-flop) has one data input T plus a clock. T = 1 makes the output flip on the active clock event. T = 0 holds the output. The usual build ties both J and K of a JK flip flop to that T pin. The … Read more
What is a Schmitt Trigger? A Schmitt Trigger is a comparator with hysteresis, made by applying positive feedback to the non-inverting input of a comparator or differential amplifier. It uses two threshold voltage levels so small noise around one trip point does not chatter the output. That dual-threshold action is hysteresis. Otto H. Schmitt described … Read more
What Does MOCP Mean in Electrical Terms? MOCP (also called MOP) stands for Maximum Over-Current Protection. It is the largest current rating allowed for the fuse or circuit breaker that protects a listed unit, such as a packaged air conditioner. The installer must not exceed the nameplate MOCP. That rating or size of the circuit … Read more
What is a Dry Contact? A dry contact (also known as a volt free contact or potential-free contact) is a switch whose power/voltage does not come from the switching device. The switched circuit supplies its own source. The contacts are called passive: they do not generate energy. When the contact is closed, current from that … Read more
What is a Dipole Antenna? A dipole antenna, also called a doublet or dipole aerial, is two equal conductive rods or wires fed at the centre, the usual first model of a linear antenna. For the common half-wave dipole the total length is about $= \frac{\lambda}{2}$ in free space. Each arm is then about a … Read more
What is a Notch Filter (Bandstop Filter)? A notch filter (also known as a bandstop filter or reject filter) blocks a chosen frequency band and passes the frequencies above and below that band. A true notch is a narrow stop. A wider stop is usually called a band-reject or band-elimination filter. A notch is a … Read more
Signal processing is the analysis, modification and synthesis of signals. Those signals may be sound, images, sensor voltages or radio waveforms. The aim is to extract information, remove noise, compress data or prepare a waveform for transmission. This category groups Electrical4U articles on those methods. The lists below cover electronic filters, modulation and telecommunications. Open … Read more
What is a Multiplexer? A multiplexer (sometimes spelled multiplexor and also known as a MUX) is a combinational circuit that selects one of several data inputs and sends that input to a single output. The inputs may be analog or digital. Digital multiplexers are also called data selectors. The same idea is used on a … Read more
What is Slew Rate? In electronics, slew rate is the maximum rate of output voltage change per unit time. It is written S. That limit sets the largest amplitude and input frequency an operational amplifier (op-amp) can handle before the output waveform is slew-limited. A higher slew rate allows a larger undistorted output swing at … Read more
What is a Current Divider? A current divider is a circuit in which the output current is a share of the input current. That happens when resistors or other elements sit in parallel. The current splits among the branches in proportion to each branch conductance, not to reduce the total energy used by the circuit. … Read more