Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
163 words
A syllabic adaptive delta modulator comprising: a. a comparator having a first input, a second input and a single output, an analog signal being fed to said first input; b. quantizing means for sampling the output signal of said comparator to generate delta modulated pulses having low frequency components; c. a syllabic fiLter connected to the output of said quantizing means for filtering the low frequency components of said delta modulated pulses; d. a multiplier connected to the output of said quantizing means and responsive to said syllabic filter for modulating the amplitude of said delta modulated pulses with the low frequency components detected by the syllabic filter; and e. an integrator connected to said multiplier for integrating the amplitude modulated delta pulses, the output of said integrator being applied to the second input of said comparator for comparing the output signal of the integrator with the input analog signal and for generating a signal depending upon the difference between the two signals.
Claim 2
Dependent Claim
163 words
A syllabic adaptive delta modulator comprising: a. a comparator having a first input, a second input and a single output, an analog signal being fed to said first input; b. quantizing means for sampling the output signal of said comparator to generate delta modulated pulses having low frequency components; c. a syllabic fiLter connected to the output of said quantizing means for filtering the low frequency components of said delta modulated pulses; d. a multiplier connected to the output of said quantizing means and responsive to said syllabic filter for modulating the amplitude of said delta modulated pulses with the low frequency components detected by the syllabic filter; and e. an integrator connected to said multiplier for integrating the amplitude modulated delta pulses, the output of said integrator being applied to the second input of said comparator for comparing the output signal of the integrator with the input analog signal and for generating a signal depending upon the difference between the two signals.
Claim 3
Dependent Claim
55 words
A syllabic adaptive delta modulator as defined in claim 1, wherein said syllabic filter consists of a first low frequency filter, of a full wave rectifier connected to the output of said first low frequency filter, and of a second low frequency first order type filter connected to the output of said full wave rectifier.
Claim 4
Dependent Claim
22 words
A syllabic adaptive delta modulator as claimed in claim 2, wherein said first low frequency filter is of the single integration type.
Claim 5
Dependent Claim
42 words
A syllabic adaptive delta modulator as defined in claim 3, wherein the cut-off frequency of said first low frequency filter is smaller than 100 Hz and wherein the cut-off frequency of said second low frequency filter is approximately equal to 120 Hz.
Claim 6
Dependent Claim
56 words
A syllabic adaptive delta modulator as defined in claim 1, wherein the said syllabic filter consists of a first low frequency filter, of a half wave rectifier connected to the output of said first low frequency filter, and of a second low frequency second order type filter connected to the output of said half wave rectifier.
Claim 7
Dependent Claim
22 words
A syllabic adaptive delta modulator as defined in claim 5, wherein said first low frequency filter is of the single integration type.
Claim 8
Dependent Claim
35 words
A syllabic adaptive delta modulator as defined in claim 6, wherein the cut-off frequency of said first filter is 100 Hz whereas the cut-off frequencies of said second low frequency filter are approximatively 120 Hz.
Claim 9
Dependent Claim
24 words
A syllabic adaptive delta modulator as defined in claim 5, wherein said first low frequency filter is of the double integration type with prediction.
Claim 10
Dependent Claim
19 words
A syllabic adaptive delta modulator as defined in claim 1, wherein the integrator is of the single integration type.