Patent
Expanded analog-to-digital converter having one-half LSB shift
TLDR
In this paper, an analog-to-analog converter is coupled to a successive approximation register for providing an indication of whether the value of the most significant bits is other than zero.Abstract:
An expanded analog-to-digital converter includes a first digital-to-analog converter for converting the most significant bits of digital output signal having a given number of bits to a first analog reference signal having a value that is proportional to the value of the most significant bits minus one-half the least significant bit of the digital output signal whenever the value of the most significant bits is other than zero; and a second digital-to-analog converter for converting the least significant bits of the digital output signal to a second analog reference signal. A successive approximation register successively provides the bits of a digital output signal in accordance with a comparison of an analog input signal with the sum of the analog reference signals. A logic circuit coupled to the successive approximation register for providing an indication of whether the value of the most significant bits is other than zero, causes the second analog reference signal to have a value that is proportional to the value of the least significant bits whenever the value of the most significant bits is other than zero, and a value that is proportional to the value of the least significant bits minus one-half the least significant bit of the digital output signal whenever the value of the most significant bits is zero.read more
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References
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Patent
Digital to analog converter with improved companding
TL;DR: In this article, a digital to analog converter includes nonlinear and linear cascaded resistive voltage dividers, with the nonlinear divider having its resistors valued to approximate a desired transfer characteristic.
Patent
Systems for converting information from digital-to-analog form and vice versa
John O Bowers,Larry Nordstrom +1 more
TL;DR: In this paper, a nonlinear analog signal generator is used to generate analog signals having amplitudes determined by the lower order bits of a digital code and a translation network including a multiplier which multiplies the first mentioned analog voltage by a factor related to the value of the higher order bit of the digital code.
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Decoder for telephonic transmissions
TL;DR: In this article, a modular decoder for transmission by coded pulses constituted by several identical individual modules wired up and interconnected so as to perform, in interrelation, various elementary functions of decoding.