Abstract: A measuring amplifier device is provided with an input circuit producing different functions of an input signal in order to permit output signals in different measuring ranges to be produced. The circuit can be constituted by an operational amplifier having a feedback connection composed of a series arrangement of several elements each defining a particular measuring range together with subtraction stages forming signals corresponding to each range, or by a plurality of diodes or diode-resistor networks connected to divide the input signal between them and each defining a different measuring scale.
Abstract: Disclosed is a differential amplifier having a pair of input terminals and multiple output terminals. Various ones of the output terminals are selectively enabled in response to output selection signals. Within the amplifier is a first transistorized circuit which generates analog signals representative of any voltage difference between the input terminals. A second transistorized circuit within the amplifier couples these analog signals to selected ones of the output terminals in response to the output selection signals.
Abstract: A CATV system is described wherein distribution cables are provided with amplifying means spaced at uniform intervals therealong. The amplifiers are provided with an input tap and two output taps, the first of which provides the usual gain to provide an output level equal to the input level plus the attenuation suffered by the signal traversing the cable from the preceding amplifier. The second output is provided by each amplifier by tapping the output signal at the first output tap with a directional coupler and processing the signal through an equalizer and coupling the output of the equalizer through a second directional coupler to a second output terminal. The signal derived at the second output terminal is such that a second identical amplifier connected to it will produce in its first output the signal levels required in the feeder system, when the first amplifier is operated at the signal levels appropriate for the main trunk system.