摘要:
An analog-to-digital conversion system includes: a first conversion device configured to communicate with a first analog-to-digital converter configured to convert a first analog signal into a first digital signal; a second conversion device configured to communicate with a second analog-to-digital converter configured to convert a second analog signal into a second digital signal; a first reference low power supply; and a second reference low power supply. The first conversion device is configured to correct the first digital signal, based on a variation amount of a second reference low voltage or a second reference low current. The second conversion device is configured to correct the second digital signal, based on a variation amount of a first reference low voltage or a first reference low current.
摘要:
Aspects of a method and system for data converters having a transfer function with multiple operating zones. In some embodiments, an operating zone of the multiple operating zones is characterized by more stringent performance criteria than the other operating zones. Thus, such data converters may receive an input signal and generate an output signal from the input signal per the transfer function and the more stringent performance criteria in the appropriate operating zone.
摘要:
In a first sensing state in which a first current flows in a forward direction with respect to a pn junction of a first semiconductor element and a second current of a different magnitude from the first current flows in a forward direction with respect to a pn junction of a second semiconductor element, a difference between a forward direction voltage of the pn junction of the first semiconductor element and a forward direction voltage of the pn junction of the second semiconductor element is converted into a digital value by a computer and acquired as a first digital value. In a second sensing state in which the second current flows in the forward direction in the pn junction of the first semiconductor element and the first current flows in the forward direction in the pn junction of the second semiconductor element, a difference between the forward direction voltage of the pn junction of the first semiconductor element and the forward direction voltage of the pn junction of the second semiconductor element is converted into a digital value by the computer and acquired as a second digital value. A temperature measurement value is computed based on an average value of the first digital value and the second digital value by the computer.
摘要:
Aspects of a method and system for data converters having a transfer function with multiple operating zones. In some embodiments, an operating zone of the multiple operating zones is characterized by more stringent performance criteria than the other operating zones. Thus, such data converters may receive an input signal and generate an output signal from the input signal per the transfer function and the more stringent performance criteria in the appropriate operating zone.
摘要:
Provided are, among other things, systems, methods and techniques for converting a continuous-time, continuously variable signal into a sampled and quantized signal. According to one implementation, an apparatus includes multiple processing branches, each including: a bandpass noise-shaping circuit, a sampling/quantization circuit, and a digital bandpass filter. A combining circuit then combines signals at the processing branch outputs into a final output signal. The bandpass noise-shaping circuits include adjustable circuit components for changing their quantization-noise frequency-response minimum, and the digital bandpass filters include adjustable parameters for changing their frequency passbands.
摘要:
An N-bit Gray counter, with N an integer greater than 1, comprises a string of N logic cells connected in cascade, wherein each logic cell comprises an input port for a succession of clock pulses, a circuit for generating a Gray count bit having an output port for the Gray count bit and a circuit for generating a clock signal having a clock output port linked to the input port of the following logic cell. An analogue-digital converter of ramp type using such a Gray counter is also provided.
摘要:
Disclosed are methods and systems implementing digital background calibration techniques for identifying and remedying dynamic path-mismatch errors in time-interleaved analog-to-digital converters (TI-ADC). The disclosed systems and methods employ a calibration technique specifically focuses on removing the timing skew and input bandwidth mismatches by equalizing each sub-ADC in an array to a common reference ADC using direct input derivative information. The errors are identified by correlating the ensuing conversion error to the input derivatives of various orders to identify the mismatch parameters. Simple passive high-pass filters (HPF) are used to extract input derivatives followed by one-bit quantizers.
摘要:
A counter includes a sampling unit suitable for sampling a logic state of a least significant bit (LSB) during a counting hold section, the counting hold section is present between first and second ramp sections; and a toggling control unit suitable for, in response to a clock and a sampling signal outputted from the sampling unit, generating the LSB according to a first voltage level of a counting target signal during a second part of the first ramp section and generating the LSB according to a second voltage level of the counting target signal during a first part of the second ramp section.
摘要:
To suppress detection accuracy of a measurement resistance from decreasing by an on-resistance of a selector switch. The selector switch is provided between a first node coupled to a first voltage through a reference resistance and multiple second nodes coupled to the second voltage through measurement resistances, and selects the second node to be coupled to the first node with the selector switch. A correction circuit generates a voltage obtained by adding the second voltage to a voltage between the second node and the first node as a correction voltage. A double integral ADC finds a first integral time elapsed when a difference voltage of the correction voltage to a voltage of the first node is integrated to the first voltage and a second integral time elapsed when the difference voltage of the first voltage to the voltage of the first node is integrated to the correction voltage.
摘要:
In one embodiment the quantizer includes a signal-to-phase converter configured to generate a phase signal according to an input signal and a phase difference digitization block configured to generate a quantization output according to differentiated samples of the phase signal, where the phase signal generated by the signal-to-phase converter has a sinusoidal shape.