The document discusses various linear integrated circuits including clippers, clampers, peak detectors, and sample and hold circuits. It defines each circuit and explains their operation. Specifically, it defines a clipper as a circuit that clips off portions of the input voltage to produce the desired output. A positive clipper removes some positive parts while a negative clipper removes some negative parts. It also defines a clamper as a circuit that adds a DC level to the output voltage. A peak detector computes and holds the peak value of an input signal. Finally, it explains that a sample and hold circuit samples an input signal and holds its last sampled value until the next sample is taken. It provides examples and applications of each circuit.