Abstract: A technique for compensating for charge transfer inefficiency in charge coupled devices. A convolver output is summed concurrently with a previous convolver output delayed by a sample period and weighted by a selected coefficient related to the charge transfer inefficiency.

Abstract: Apparatus for identifying intended crossing events of a preselected value of an analog signal is disclosed. The apparatus further identifies whether the signal is rising or falling during those crossing events.

Abstract: A phase correction system is disclosed for adjusting a phase relationship of periodic data samples, based on a level crossing detector identifying certain data samples in connection with a preselected value.

Abstract: An expected level determination system is disclosed for determining the expected level of incoming analog signals at the receiver end of a digitally based communications channel. This is accomplished by a feedback loop based on apportionment.

Abstract: A communications channel monitoring system is disclosed for digitally based communication channels carrying signals corrupted by noise. The monitor system provides a signal indicative of the expected value of the communication channel signal if uncorrupted by noise and provides a signal indicating the extent of any such corruption.

Abstract: An offset adjustment system is disclosed to correct for the presence of a constant or slowly varying additive component in an incoming analog baseband signal at the receiver end of a digitally based communications channel based on a level crossing detector identifying certain data samples in connection with a preselected value.

Abstract: An amplitude range classifier for classifying the amplitude of an analog signal into one or more subranges of a larger range is provided.

Abstract: A communications channel monitoring system is disclosed for digitally based communication channels carrying signals corrupted by noise. The monitor system provides a signal indicative of the expected value of the communication channel signal if uncorrupted by noise and provides a signal indicating the extent of any such corruption.

Abstract: An equalizer bias signal removal system for adjusting an analog input signal toward being symmetrical about a reference signal level where said analog input signal, combined with a correction signal, is to be converted by an analog-to-digital converter and provided to a transversal filter equalizer.

Abstract: A new single sideband transmitter is disclosed which permits use of single sideband techniques with less stringent requirements for the filters used therewith. An especially advantageous version can be constructed for a digitized discrete time system including converting the input data to a partial response format.

Abstract: A communications receiver transversal filter equalizer is disclosed of the type using fixed increment tap weight adjustments involving use of amplitude data from the incoming signal in conjunction with tap weight adjustments.

Abstract: A communications receiver transversal filter equalizer is disclosed of the type using fixed increment tap weight adjustments involving use of amplitude data from the incoming signal in conjunction with tap weight adjustments.

Abstract: A bandpass or band reject filter system is provided for operating on frequencies in an input signal with the filter system containing a feedback loop. Quadrature components of the frequencies of interest occurring in the output signal are acted on in the feedback loop to provide a feedback signal, which can be used directly itself, to be summed with the input signal thereby effecting a cancellation of the frequencies of interest therein. The frequencies of interest can be chosen by manual tuning, or by a self-tuning system which can be provided by the addition of a further feedback arrangement.