摘要:
A Successive Approximation Register Analog-to-Digital Converter including: a comparing module (170) and a calibration circuit (160). The comparing module (170) is arranged to generate a first comparison result by comparing an input voltage value (V in' ) of the SAR ADC (100) with a first voltage value (V cm +V delta ) and a second result by comparing the input voltage value with a second voltage value (V cm -V delta ); the calibration circuit (160) coupled to the comparing module (170) is for generating a determination result determining whether the input voltage value (V in' ) is in a range according to the first comparison result and the second comparison result, and enters a calibration mode according to the determination result.
摘要:
Method for conversion of a value of an analog signal to a compressed digital word (CW) uses conversion of the analog signal to a linear digital word (LW) according to a successive approximation scheme. The process of conversion of the analog signal to the linear digital word (LW) is terminated by the compression module (CPM) when all bits of the compression word (CW) have been already evaluated. Apparatus for conversion of a value of an analog signal to a compressed digital word a linear successive approximation analog-to-digital converter (SA-ADC). The output of the linear digital word (LW) of this converter is connected to the input of the linear digital word (LW) of the compression module (CPM) comprising a section number register (RegS), while complete conversion signal output (End) of the compression module (CPM) is connected to a complete conversion signal input (End) of the linear analog-to-digital converter (SA-ADC), and a bit ready signal output (BitRdy) of the linear analog-to-digital converter (SA-ADC) is connected to a bit ready signal input (BitRdy) of the compression module (CPM).
摘要:
A method for conversion of a time interval to a digital word using a successive approximation scheme characterized in that the time interval (T) is mapped to a difference of a length of a reference time (RT) and a length of a signal time (ST). The reference time (RT) is generated from an instant (t 1 ) when the beginning of the time interval (T) is detected, and the signal time (ST) is generated from an instant (t 2 ) when the end of the time interval (T) is detected by the use the control module (CM). The generation of the reference time (RT) and the signal time (ST) is terminated at the same instant (t 3 ). An apparatus for conversion of a time interval to a digital word using a successive approximation scheme comprises a control module (CM), two comparators (K R , K S ), two current sources (I R , I S ), two rails (R, S) and a set of capacitors (CS). The apparatus is characterized in that bottom plates of capacitors (C n-1 , C n-2 , ..., C 1 , C 0 ) of the set of capacitors (CS) are connected to a ground of the circuit, and top plates of these capacitors are connected respectively to moving contacts of change-over switches (S n-1 , S n-2 , ..., S 1 , S 0 ). First stationary contacts are connected to the signal rail (S), second stationary contacts are connected to the ground of the circuit, and third stationary contacts are connected to the reference rail (R).
摘要:
Analog-digital converter configured for conversion of an input voltage, represented by a pair of input potentials, into a binary code using successive approximation. The analog-digital converter comprises a reference voltage generator (RVG) supplying a first pair of reference potentials and a second pair of reference potentials. The analog-digital converter further comprises a switched capacitor array (SCA) configured to receive the first and the second pair of reference potentials as well as a control unit (CTRL) coupled to the switched capacitor array (SCA) and configured to switch capacitors of the switched capacitor array (SCA) either to the first pair of reference potentials or to the second pair of reference potentials depending on a progress of the conversion.
摘要:
In one embodiment, a circuit includes a first input of a comparator for an analog to digital converter (ADC). The first input is coupled to a first capacitive network. The circuit further includes a second input of the comparator for the ADC. The second input is coupled to a second capacitive network. The first capacitive network includes a first set of capacitors where a first plate of the first set of capacitors is selectively coupled to an input signal. The second capacitive network includes a second set of capacitors where a second plate of the first set of capacitors is selectively coupled to the input signal. The first plate and the second plate are opposite plates of the first set of capacitors and the second set of capacitors.
摘要:
A cognitive signal converter connectable to an analog signal source via an analog signal input port and adapted to produce a digital output signal based on an analog input signal received via the analog signal input port is disclosed. The cognitive signal converter comprises an analog-to-digital converter and a cognitive network. The analog-to-digital converter is adapted to produce a digital converted signal based on the analog input signal, a sample clock signal and a process clock signal by sampling the analog input signal in accordance with the sample clock signal and quantizing each analog input signal sample, wherein the quantizing process is operated by the process clock signal. The cognitive network is adapted to receive the digital converted signal of the analog-to-digital converter, control at least one of the sample clock signal and the process clock signal based on the received digital converted signal and one or more characteristics of the analog signal source, and produce the digital output signal based on the received digital converted signal. Corresponding integrated circuit, electronic device and method are also disclosed.
摘要:
A time to digital converter (10) is disclosed. The time to digital converter (10) comprises: a synchronisation block (20) configured to output a voltage pulse (110) with duration based on a time difference between a reference oscillating signal (101) and an input oscillating signal (107); a charge pump (41) arranged to receive the voltage pulse (110) and to convert the voltage pulse into a current pulse; an integrator (50) comprising an integrator capacitor (24, 25), the integrator (50) being configured to receive the current pulse (110) and integrate the current pulse (110) as a charge on the integrator capacitor (24, 25), resulting in an integrator output voltage (115); and a successive approximation register (40) configured to determine the integrator output voltage (115) with respect to a reference voltage by adjusting the charge on the integrator capacitor (24, 25) so as to reduce the integrator output voltage (115) to within a least significant bit (D0) of a reference voltage by successive approximation, and configured to output the determined integrator output voltage (115) as a digital signal (125). A phase locked loop comprising the time to digital converter (10) is disclosed.
摘要:
A battery monitoring device for monitoring a cell group made by connecting a plurality of single battery cells in series includes a first switching circuit configured to select, as a measurement target voltage, any one of a plurality of types of voltages including the cell voltages of the single battery cells in the cell group, a differential amplifier circuit including a first input terminal and a second input terminal, and configured to convert the measurement target voltage, which is selected by the first switching circuit and input to between the first input terminal and the second input terminal, into a voltage in a predetermined range by performing differential amplification, and an AD converter configured to measure the measurement target voltage which is selected by the first switching circuit and converted by the differential amplifier circuit, and output a digital signal according to the measurement result, wherein an abnormality detection voltage, with which abnormality in a differential amplification characteristic of the differential amplifier circuit is detected, is output to the AD converter.
摘要:
Circuits for generating voltage references are common in electronics. For example, these circuits are used in analog-to-digital converters, which convert an analog signal into its digital representation by comparing analog input signals against one or more voltage references provided by those circuits. In many applications, the speed and accuracy of such voltage references are very important. The speed of the voltage references is related to the physical properties of the devices in the circuit. The accuracy of the voltage reference is directly related to the circuit's ability to trim the full-scale voltage output. The present disclosure describes a fast and efficient reference buffer with a wide trim range which is particular suitable for submicron processes and high speed applications. The reference buffer comprises a plurality of diode-connected transistors, which can be selected to turn on or off using a controller to provide a wide trim range.
摘要:
Mixed-signal circuitry, comprising: an array of ADC units configured to operate in a time-interleaved manner, and each operable in each of a series of time windows to convert an analogue input value into a corresponding digital output value, each conversion comprising a sequence of sub-conversion operations, each successive sub-conversion operation of a sequence being triggered by completion of the preceding sub-conversion operation; and a controller, wherein: at least one of the ADC units is operable to act as a reporting ADC unit and indicate, for each of one or more monitored said conversions, whether or not a particular one of the sub-conversion operations completed during the time window concerned; and the controller is operable to consider at least one such indication and to control the circuitry in dependence upon the or each considered indication.