Abstract: In accordance with an embodiment, a method of calibrating a circuit includes coupling a first reference voltage to a first input of the circuit, coupling a programmable reference voltage to a reference node of a digital-to-analog converter (DAC), such that the gain of the DAC is dependent on an input value at the reference node. The method further includes providing a first predetermined input code to the DAC, summing an output of the DAC with the first reference voltage to produce a summed output, comparing the summed output to a threshold, and adjusting the programmable reference voltage until the summed output is within a predetermined range of the threshold.

Abstract: A circuit arrangement for measuring a load current provided to a load via a first load terminal of a load transistor is disclosed. In accordance with one example of the invention, the circuit arrangement includes a sense transistor coupled to the load transistor to provide a sense current representing the load current at a first load terminal of the sense transistor. The first load terminals of the load and the sense transistors are at respective floating electric potentials. A floating sense circuit coupled between the load terminals of sense transistor and load transistor, at least in one mode of operation the sense circuit receives the sense current and provides a floating signal representing the sense current. A non-floating measurement circuit is coupled to the sense circuit via a DC decoupling capacitor for transferring the floating signal representing the sense current to the non-floating measurement circuit.

Abstract: Representative implementations of devices and techniques provide analog to digital conversion of multiple parallel analog inputs. An input interface is arranged to organize the parallel analog inputs and an analog-to-digital converter (ADC) is arranged to sequentially convert the multiple parallel analog inputs to digital results.

Abstract: In various embodiments a circuit is provided which may include a node at which a circuit potential may be provided; an alternating voltage providing circuit configured to provide a DC current free alternating voltage; a rectifier coupled to the alternating voltage providing circuit, the rectifier including a first rectifier terminal and a second rectifier terminal, wherein the first rectifier terminal or the second rectifier terminal may be coupled to the node; and a first output terminal and a second output terminal, wherein the first output terminal may be coupled to the first rectifier terminal to provide a first potential and wherein the second output terminal may be coupled to the second rectifier terminal to provide a second potential different from the first potential, the difference between the first potential and the second potential defining an output voltage, wherein the output voltage may be constant independent of the circuit potential.

Abstract: In various embodiments an analog-to-digital converter arrangement is provided, which may include an input terminal configured to receive a signal to be converted; a reference terminal configured to receive a reference signal; a voltage domain specific reference terminal configured to receive a voltage domain specific reference signal; an analog-to-digital converter circuit coupled to the input terminal, the reference terminal, and to the voltage domain specific reference terminal configured to compare the signal to be converted with the voltage domain specific reference signal, thereby generating a first digital comparison signal, and to compare the reference signal with the voltage domain specific reference signal, thereby generating a second digital comparison signal; and a ratiometric circuit configured to determine a digitally converted signal of the signal to be converted using the first digital comparison signal and the second digital comparison signal.

Abstract: In accordance with various embodiments, a method for sampling an input signal may be provided, wherein the method may include providing a single frequency clock signal; selecting clock pulses from the single frequency clock signal in a random manner to generate a spread spectrum clock signal; and sampling the input signal using the spread spectrum clock signal. A corresponding device for sampling an input signal may be provided.

Abstract: A current input analog-to-digital converter and a corresponding current measurement circuit is disclosed. In accordance with one example of the invention, an analog-to-digital conversion circuit includes a register for storing a digital register value and a digital-to-analog converter that is configured to provide a reference current at a circuit node which is set in accordance to the digital register value. The electric potential of the input node is responsive to the reference current set. A comparator circuit is configured to compare the potential of the circuit node with at least one threshold, thus assessing whether the potential of the circuit node is at least approximately at a desired value. Control circuitry is responsive to the comparator circuit and is configured to adjust the digital register value stored in the register and to adjust the reference current until the comparator indicates that the potential of the circuit node does not deviate from the desired value.

Abstract: A circuit arrangement for measuring a load current provided to a load via a first load terminal of a load transistor is disclosed. In accordance with one example of the invention, the circuit arrangement includes a sense transistor coupled to the load transistor to provide a sense current representing the load current at a first load terminal of the sense transistor. The first load terminals of the load and the sense transistors are at respective floating electric potentials. A floating sense circuit coupled between the load terminals of sense transistor and load transistor, at least in one mode of operation the sense circuit receives the sense current and provides a floating signal representing the sense current. A non-floating measurement circuit is coupled to the sense circuit via a DC decoupling capacitor for transferring the floating signal representing the sense current to the non-floating measurement circuit.

Abstract: A current input analog-to-digital converter and a corresponding current measurement circuit is disclosed. In accordance with one example of the invention, an analog-to-digital conversion circuit includes a register for storing a digital register value and a digital-to-analog converter that is configured to provide a reference current at a circuit node which is set in accordance to the digital register value. The electric potential of the input node is responsive to the reference current set. A comparator circuit is configured to compare the potential of the circuit node with at least one threshold, thus assessing whether the potential of the circuit node is at least approximately at a desired value. Control circuitry is responsive to the comparator circuit and is configured to adjust the digital register value stored in the register and to adjust the reference current until the comparator indicates that the potential of the circuit node does not deviate from the desired value.

Abstract: Measurement apparatuses and methods are described. A measurement input is coupled with a first terminal of a capacitance via a first switch, and a reference voltage is coupled with the first terminal of the capacitance via a second switch. A measurement circuit is coupled to a second terminal of said capacitance.

Abstract: A circuit has a first amplifier having first positive and negative inputs and a second amplifier having second positive and negative inputs. A first unit is connectable to the first and second inputs of the amplifiers and a second unit is connectable to the first and second inputs of the amplifiers. In a first phase, the first unit is connected to the amplifiers, wherein the positive input of the first amplifier is coupled to the positive input of the second amplifier and the negative input of the first amplifier is coupled to the negative input of the second amplifier. In a second phase, the second unit is connected to the amplifiers, wherein the positive input of the first amplifier is coupled to the negative input of the second amplifier and the negative input of the first amplifier is coupled to the positive input of the second amplifier.

Abstract: An A/D converter has at least one converter stage which, respectively, has a sample and hold circuit for sampling an analog input signal. The converter stage also includes a comparator unit that compares the analog input signal with a reference value in order to produce a digital output value from the converter stage, a digital/analog converter for converting the digital output value into an analog signal, a subtractor for subtracting the analog signal from the sampled input signal, a signal amplifier for amplifying the output signal which is output by the subtractor with a particularl singal gain factor for the next converter stage, and a weighting unit for multiplying the digital output value by a multiplier for addition to further weighted output values from converter stages to produce the digital output value from the A/D converter.

Abstract: The invention relates to a multistage differential amplifier circuit having a multistage differential amplifier which has an input stage and at least one output stage connected downstream of the input stage, having a CMFB circuit whose input side is connected to outputs on the output stage, having a first control loop, which can be used to set a load for the input stage using a first control signal from the CMFB circuit, having at least one second control loop, which is arranged between the outputs of the output stage and a control input on the CMFB circuit and which uses an output common-mode level which can be tapped off at the output stage to produce a continuous-time, second control signal for setting an operating point for the CMFB circuit.

Abstract: An integrated circuit having a sample-and-hold device is provided, which can be operated in successive cycles which each include a sample phase and a hold phase. During a sample phase a first storage device is charged to a voltage value proportional to an analog input signal, which voltage value is provided for a further circuit part of the integrated circuit in the hold phase. A second storage device is charged during a first cycle to a voltage value which is inverted relative to a final voltage value of the first storage device in the hold phase. In the sample phase of the next cycle following the first cycle, the second storage device is connected to the first storage device in order to discharge the first storage device.

Abstract: The invention relates to a multistage differential amplifier circuit having a multistage differential amplifier which has an input stage and at least one output stage connected downstream of the input stage, having a CMFB circuit whose input side is connected to outputs on the output stage, having a first control loop, which can be used to set a load for the input stage using a first control signal from the CMFB circuit, having at least one second control loop, which is arranged between the outputs of the output stage and a control input on the CMFB circuit and which uses an output common-mode level which can be tapped off at the output stage to produce a continuous-time, second control signal for setting an operating point for the CMFB circuit.

Abstract: An A/D converter has at least one converter stage which, respectively, has a sample and hold circuit for sampling an analog input signal. The converter stage also includes a comparator unit that compares the analog input signal with a reference value in order to produce a digital output value from the converter stage, a digital/analog converter for converting the digital output value into an analog signal, a subtractor for subtracting the analog signal from the sampled input signal, a signal amplifier for amplifying the output signal which is output by the subtractor with a particularl singal gain factor for the next converter stage, and a weighting unit for multiplying the digital output value by a multiplier for addition to further weighted output values from converter stages to produce the digital output value from the A/D converter.

Abstract: A digital to analogue converter with current output and a mixer with current input are used, and the entire circuit configuration operates within the current area. This means that the current output of the digital to analogue converter, if necessary, is directly connected to the current input of the mixer with intermediate insertion of a filter operating within the current area, without any conversion of the current signals occurring between the digital to analogue converter and the mixer into a voltage. Therefore, the circuitry cost can be reduced because various components are dispensed with and the signal quality improved, since distortions and noise are prevented due to current to voltage conversion at the end of the digital to analogue converter or voltage to current conversion at the input of the mixer.

Abstract: An integrated circuit having a sample-and-hold device is provided, which can be operated in successive cycles which each include a sample phase and a hold phase. During a sample phase a first storage device is charged to a voltage value proportional to an analog input signal, which voltage value is provided for a further circuit part of the integrated circuit in the hold phase. A second storage device is charged during a first cycle to a voltage value which is inverted relative to a final voltage value of the first storage device in the hold phase. In the sample phase of the next cycle following the first cycle, the second storage device is connected to the first storage device in order to discharge the first storage device.

Abstract: A method and circuit configuration for mixing a digital signal with an analogue signal. A digital to analogue converter with current output and a mixer with current input are used, and, according to the invention, the entire circuit configuration operates within the current area. This means that the current output of the digital to analogue converter, if necessary, is directly connected to the current input of the mixer with intermediate insertion of a filter operating within the current area, without any conversion of the current signals occurring between the digital to analogue converter and the mixer into a voltage. Therefore, the circuitry cost can be reduced because various components are dispensed with and the signal quality improved, since distortions and noise are prevented due to current to voltage conversion at the end of the digital to analogue converter or voltage to current conversion at the input of the mixer.