Sample and hold signal conditioners are used in conjunction with digital panel meters to acquire fast instantaneous voltage readings which are programmed in time at any position of a waveform. A typical sample and hold measures amplitudes up to ±10 volts. Upon application of a logic one to a control line, the sample and hold acquires and its output tracks the waveform until the logic level is returned to zero. At that point on the waveform the amplitude is held by the sample and hold the DPM then reads the output of the sample and hold.
Sample and Hold Sample CD
A component of a type of analogue-to-digital converter. The analogue signal is frozen in a sample and hold circuit to prevent it changing during digitisation. For more information on A-D converters see Issue 3 of Monitor.
In electronics, a sample and hold circuit is used to interface real-world, changing analogue signals to a subsequent system such as an analog-to-digital converter. The purpose of this circuit is to hold the analogue value steady for a short time while the converter or other following system performs some operation that takes a little time.