The term "active low" means that the input on an IC requires a logic low for it to be activated, i.e a low voltage (of course the voltage range is dependent on the technology, TTL, CMOS etc) Active high is the opposite... the input requires a logic high for it to be activated. A simple example to illustrate, an 8bit counter can count UP/DOWN this functionality is controlled with only one pin, an active high on that pin to count up or low to count down.
A common base NPN amplifier is used for high frequency applications as the base minimize oscillations at high frequency, separates the input and output. In a common base NPN amplifier the voltage gain is high, relatively low input impedance and high output impedance compared to the common collector.
Finger print scanner, eye scanner (for high security area) ect.
Assuming you meant "How do you get a high quality smooth finish on a piece of wood" - Use progressively finer sand-paper to smooth the surface.
Input and output devices are similar in operation but perform opposite functions. It is through the use of these devices that the computer is able to communicate with the outside world. Input data may be in any one of three forms: Manual inputs from a keyboard or console Analog inputs from instruments or sensors Inputs from a source on or in which data has previously been stored in a form intelligible to the computer
A computer system accepts raw data, stores it, processes it and output information in a high degree of accuracy.
FET has very high input impedanceBJT has very low input impedance
An amplifier amplifies the small input signal to a high signal without changing its freqency.
strobe is enable input in a digital IC...if its made active high...it will be enabled..some IC strobe is active low.. Its function is to enable the operation of the IC..or gate or Mux...
Transistor=Transfer+Resistor. When Transistor operates in active region its input resistance is high and output resistance is low. So,We can consider transistor as a device which transfers its resistance from high to low. And by this property transistor amplifies input signal.
high input is for speaker level input and low input is rca jacks
Most control signals in electronics are active-low signals (usually reset lines, chip select lines and so on). This stems from the fact that most logic families can sink more current than they can source, so fanout and noise immunity increase. (The reason for this is ultimately related to the fact that electrons are negatively charged.) It also allows for wired-OR logic if the logic gates are open-collector/open-drain with a pull-up resistor. Examples of this are the I²C bus and Controller Area Network (CAN).
Digital voltmeter has high input impedence.
it has high input impedance
Because op amp consist differential amplifier and they posses high input impedance so that op-amp also posses high input impedance.
Active optics are where you manipulate the mirrors and lenses in your telescope to compensate for the swimming effects in your images caused by the motions of the gases in the atmosphere. These techniques have become possible with the advent of cheap high speed computers.
An inverter has a high output when the input is low, and a low output when the input is high.
FET s have very high input impedance when compared with Bipolar transistors.