Abstract:
An equalizer of a coaxial transmission system is automatically adjusted by applying a sweep signal to the equalizer and comparing the output of the equalizer with a predetermined reference signal to develop an error signal. The output signal of the equalizer is simultaneously converted into a plurality of weighting signals, each representing the energy content of the output signal within a passband which includes one equalizer transmission network characteristic, i.e., ''''bump.'''' Each weighting signal is multiplied by the error signal and integrated to develop a control signal for the associated equalizer transmission network.
Abstract:
A VOLTAGE-CONTROLLED OSCILLATOR IS PROVIDED WHICH INCLUDES A GYRATOR CIRCUIT CONNECTED IN THE SERIES FEEDBACK PATH OF THE OSCILLATOR. THE GYRATOR, WHEN CAPACITVELY TERMINATED, FUNCTIONALLY RESEMBLES AN INDUCTANCE AND IS CONNECTED AS A TWO-PORT NETWORK IN THE FEEDBACK PATH.
Abstract:
A multibump equalizer having a main path which comprises an amplifier and a summing network and a plurality of feedback paths each including an individual amplifier and shaping network connected from the output of the equalizer to individual inputs to the summing network. All amplifiers and the summing network can be realized with a single operational amplifier.
Abstract:
A multibump equalizer wherein a plurality of shaping networks are serially connected between a first summing network-amplifier combination and individual inputs to a second summing networkamplifier combination. A frequency independent feedforward path connects the input to the equalizer, which is also connected to an individual input of the first summing network, to an individual input on the second summing network. A frequency independent feedback path connects the output of the equalizer, which is also connected to the output of the first amplifier, to an individual input of the first summing network.