Abstract:
A drive-mode oscillator module generates at least one proof-mass drive signal for use within a micro-electro-mechanical system (MEMS) device. The drive-mode oscillator module comprises at least one gain control component arranged to receive at least one proof-mass motion measurement signal, and to generate a digital modulation control signal based at least partly on the at least one proof-mass motion measurement signal, and at least one modulation component arranged to receive the digital amplitude modulation control signal, and to output at least one proof-mass drive signal. The at least one modulation component is arranged to digitally modulate the at least one proof-mass drive signal based at least partly on the received digital amplitude modulation control signal.
Abstract:
An audio communication unit comprises a receiver for receiving an audio signal, a sigma-delta modulator operably coupled to the receiver and arranged to modulate the received audio signal, and a class-D amplifier stage operably coupled to the sigma-delta modulator and arranged to amplify the modulated received audio signal. One or more feedback path(s) is/are arranged from an output of the class-D amplifier stage to the sigma-delta modulator. The provision of one or more feedback path(s) from the output of the class-D audio amplifier to the sigma-delta modulator facilitates smaller die size; higher power efficiency and power supply rejection ratio/intermodulation cancellation performance.
Abstract:
An electronic circuit comprises one or more upstream stages and two or more downstream stages positioned, in a processing direction of the signals, downstream of the upstream stage. A plurality of configurable connections is present between the upstream stage and the downstream stages. The connections are configurable to provide a predetermined communication path between a respective upstream stage and one or more selected downstream stage selected from the two or more downstream stages and to communicatively disconnect the upstream stage from not selected downstream stages. The electronic circuit may for example be an amplifier circuit.
Abstract:
In order to feed to the converter on the load side of an intermediate-link frequency converter a frequency control signal (fI(S)*) which is formed by means of an angle controller (RW) from the difference of an angle reference value (wi(F)*) and a corresponding actual value (wI(F)), an actual value of the phase current is required which, for stable operation, must not contain heavy harmonics in stable operation nor must not be damped excessively dynamically by smoothing. Therefore, the measured actual angle value (wI(S)) is fed as the reference value of a servo controller (RS), to the output of which the integral (wI(S)*) of the frequency control quantity is added and the output of which is fed back to the input of the servo controller (RS).
Abstract:
The present invention provides a current source comprising a first bias current control element, the first bias current control element being configured to generate a first current if the control value is lower than a reference value and configured to generate a second current if the control value equal to or higher than the reference value. In addition or alternatively the bias current source comprises a second bias current control element, the second bias current control element being configured to generate a third current if the control value is lower than or equal to the reference value and configured to generate a fourth current if the control value is higher than the reference value. Furthermore, the present invention provides an integrated circuit and a method.
Abstract:
A voltage regulator for providing a voltage regulated output to a load comprises a first loop and a second loop. The first loop comprises a first active device coupled to a first pass device and configured to provide a first, relatively high current output to the load. The second loop comprises a second active device coupled to a second pass device and configured to provide a second, relatively low current output to the load.In this manner, when the inventive concept is applied to low drop-out regulators, the provision of two independent loops reduces dramatically the quiescent current provided by the voltage regulator under low load conditions.
Abstract:
A drive-mode oscillator module for use within a micro-electro-mechanical system (MEMS) device is described. The drive-mode oscillator module is arranged to receive a proof-mass measurement signal from a proof-mass of the MEMS device and to output a proof-mass actuation signal to the proof-mass of the MEMS device. The drive-mode oscillator module comprises a first, higher gain accuracy drive-mode component for generating an actuation signal to be output by the drive-mode oscillator module during an active mode of the MEMS device, and a second, lower power consumption drive-mode component for generating an actuation signal to be output by the drive-mode oscillator module during a standby mode of the MEMS device.
Abstract:
A drive-mode oscillator module generates at least one proof-mass drive signal for use within a micro-electro-mechanical system (MEMS) device. The drive-mode oscillator module comprises at least one gain control component arranged to receive at least one proof-mass motion measurement signal, and to generate a digital modulation control signal based at least partly on the at least one proof-mass motion measurement signal, and at least one modulation component arranged to receive the digital amplitude modulation control signal, and to output at least one proof-mass drive signal. The at least one modulation component is arranged to digitally modulate the at least one proof-mass drive signal based at least partly on the received digital amplitude modulation control signal.
Abstract:
An electronic circuit comprises one or more upstream stages and two or more downstream stages positioned, in a processing direction of the signals, downstream of the upstream stage. A plurality of configurable connections is present between the upstream stage and the downstream stages. The connections are configurable to provide a predetermined communication path between a respective upstream stage and one or more selected downstream stage selected from the two or more downstream stages and to communicatively disconnect the upstream stage from not selected downstream stages. The electronic circuit may for example be an amplifier circuit.
Abstract:
An amplifier circuit which, includes a first input for receiving a first input signal and a second input for receiving a second input signal. A first amplifier section is connected to the first input and the second input is present. The first amplifier section can combine the first signal and the second signal into a first combined signal, the first amplifier being connected to a first output, for outputting the first combined signal. A second amplifier section is connected to the first input and the second input, for combining the first signal and the second signal into a second combined signal, the second amplifier being connected to a second output, for outputting the second combined signal. A common mode section is connected to the first input and the second input, for generating a common mode signal based on a combination of the first signal and the second signal and outputting the common mode signal at a common output connected to the common mode amplifier. The first combined signal, the second combined signal and the common mode signal satisfy the condition that combining the first combined signal and the common mode signal results in a signal with an amplitude proportional to the amplitude of the first input signal and combining the second combined signal and the common mode signal results in a signal with an amplitude proportional to the amplitude of the second input signal.