Filter
OwnerKamilo Feherinventor
Life of this patent
Estimating the term…
Abstract
A filter for a pulse form of signal which substantially reduces sidebands, yet provides an output signal which is substantially free of jitter and at the same time has no inter-symbol interference. The filter comprises means for detecting the pulse type of signal and for substituting .pi. radians of a sine wave signal with a positive slope upon detection of a positive going leading edge of the pulse type signal and .pi. radians of a sine wave signal with a negative slope upon detection of a negative going trailing edge of the pulse type signal, at an output terminal.
Claims7
A filter having an input for receiving a pulse signal form of binary information and an output for providing a synthesized output signal correlated to the input signal comprising:
- (a) means for comparing the output signal with the input signal one bit at a time,
- (b) means connected to said comparing means and said output for generating a first predetermined output signal waveform when the output signal bit is different from that of the input signal and the input signal is binary "1",
- (c) means connected to said comparing means and said output for generating a second predetermined output signal waveform when the output signal bit is different from that of the input signal and the input signal is binary "0",
- (d) means connected to said comparing means and said output for generating a third predetermined output signal waveform when the output signal bit is the same as that of the input signal and the input signal is binary "1",
- (e) means connected to said comparing means and said output for generating a fourth predetermined output signal waveform when the output signal bit is the same as that of the input signal and the input signal is binary "0",
- in which the predetermined output signals are continuous, whereby the spectra and sidelobes of the output signal which is correlated to the input signal are controlled to a predetermined extent.
A filter having an input for receiving an input pulse type signal and an output for providing an output signal comprising:
- (a) means for comparing the output signal with the input signal,
- (b) means connected to said comparing means and said output for generating a first predetermined output signal waveform for one bit interval when the output signal is different from the input signal, and
- (c) means connected to said comparing means and said output for generating a second predetermined output signal waveform for one bit interval when the output signal is the same as the input signal,
- whereby the spectra and sidelobes of the output signal which is correlated to the input signal are controlled to a predetermined extent, while retaining the data form of the input signal.
Dependencies are inferred from the claim text.