Coded data generation or conversion – Analog to or from digital conversion – Differential encoder and/or decoder
Patent
1992-12-11
1995-05-16
Williams, Howard L.
Coded data generation or conversion
Analog to or from digital conversion
Differential encoder and/or decoder
341161, H03M 300
Patent
active
054164834
ABSTRACT:
A noise shaping circuit permitting a wide dynamic range for input signal and having an improved S/N ratio. In FIG. 1, the circuit comprises a delay part 3 for delaying the output signal for a one-sampling period; a first subtraction part 1 for subtracting the delayed signal, via the delay part 3 from the input signal imparted to the input terminal so as to generate first subtraction results; a first integration part 2 for integrating the first subtraction results; a second subtraction part 4 for subtracting the input signal from the first integrated value of the part 2; a second integration part 5 for integrating the second subtraction value so as to obtain a second integrated value; an addition part 7 for adding the first and second integrated values so as to obtain an addition results, and a quantizer 6 for quantizing the addition results. The amplitude of the signal imparted to the part 5 is minimized by means of the part 4, so that the dynamic range of the part 5 is utilized with high efficiency.
REFERENCES:
patent: 4862169 (1989-08-01), Van Bavel et al.
patent: 5153593 (1992-10-01), Walden et al.
(J-SC/22/6//17214) A 16-Bit Oversampling A-to-D Conversion Technology Using Triple-Integration Noise Shaping, Matsuya et al., IEEE Journal of Solid State Circuits, SC-22(6):921-929 (1987).
A Multi-Stage Noise Shaping 16 Bit CMOS A to D Conversion LSI, Matsuya et al. ICD87-52:7-12 (1987).
The Design of Sigma.gtoreq.Delta Modulation Analog-to-Digital Converters, Boser et al., Reprinted from IEEE J. Solid-State Circuits, SC-23:1298-1308.
Improved Double Integration Delta-Sigma Modulations For A to D to A Conversion, Shoji et al., Reprinted from IEEE Proc. ISCAS 87:451-454 (1987).
Nippon Telegraph and Telephone Corporation
Williams Howard L.
LandOfFree
Method and circuit for noise shaping does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and circuit for noise shaping, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and circuit for noise shaping will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-640775