Müller, Marius Ausländer, Simon Spinnler, Andrea Ausländer, David Sikorski, Julian Folcher, Marc Fussenegger, Martin
Advantages include high sensitivity, linearity, low quantitizing error, high resistance to mechanical shock and vibration loads, and temporary data storage capabilities.ĭesigned cell consortia as fragrance-programmable analog-to-digital converters. Highly linear, sensitive analog-to-digital converterĪnalog-to-digital converter converts 10 volt full scale input signal into 13 bit digital output. The converter comprises a plurality of power splitters, power combiners and a plurality of mixers or RF switches connected in a predetermined configuration. As a consequence, the same resistor string may be used for two different digital-to-analog converters of the subranging circuit.Ī digital-to-analog converter is disclosed for producing an RF output signal proportional to a digital input word of N bits from an RF reference input, N being an integer greater or equal to 2. In another aspect of the present invention, the subranging circuit comprises two sets of differential input pairs in which the transconductance of one differential input pair is scaled relative to the transconductance of the other differential input pair. This is achieved by subdividing the digital representation into two or more parts and subtracting from the analog input signal analogs of each of the individual digital portions. As a subranging circuit, the circuit produces a residual signal representing the difference between an analog input signal and an analog of a digital representation. The sinusoidally-varying output signal is then digitized by the thresholding element, which includes a saturable absorber or at least one semiconductor optical amplifier, to form the optical digital signal which can be output either in parallel or serially.Īnalog current mode analog/digital converterĪn improved subranging or comparator circuit is provided for an analog-to-digital converter. The interferometer uses the optical analog signal and the sampling optical signal to generate a sinusoidally-varying output signal using cross-phase-modulation (XPM) or a photocurrent generated from the optical analog signal.
Each bit of the digital representation is separately determined using an optical waveguide interferometer and an optical thresholding element. Vawter, G Allen [Corrales, NM Raring, James [Goleta, CA Skogen, Erik J [Albuquerque, NMĪn optical analog-to-digital converter (ADC) is disclosed which converts an input optical analog signal to an output optical digital signal at a sampling rate defined by a sampling optical signal.
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