Robert Boschgmbh

Karl-Heinz Klein

Reinhard Kutzner

Wilfried Richter

To suppress quantitizing ambiguities upon digital transmission of an analog signal, a random access memory (RAM) (13) is connected at the end terminal of a digital transmission line, and has its output connected to an adder stage (15). The adder stage adds the digital value of +1 to the output from the RAM (13). The value of the digitized data word, incremented by +1, is then compared in a subsequent interrogation cycle of the value at the input to the memory and only if the deviation is greater than .+-.1, a comparator, effecting the comparison, provides a 'store' signal for transfer of the new value to the RAM (13). The D/A converters, only then, are changed to provide a changed output analog signal.

Method and circuit for suppression of quantitizing noise ambiguities

In order to eliminate crosstalk between adjacent playback and recording heads in a multi-track, multi-head magnetic tape recorder or playback apparatus, the invention provides for tapping off part of the recording current and suitably adjusting its amplitude and/or phase to define a correction current which is applied to the playback head of the apparatus. The voltage resulting from the correction current exactly compensates the voltage induced by the stray magnetic field of the recording head. The correction circuit includes frequency-dependent components which account for the frequency dependence of the crosstalk signals.

Growing community of inventors

Wiesbaden-Erbenheim, Germany

Karl-Heinz Klein