摘要:
A voltage converter includes a power switch having respective charging and discharging control terminals, and an output terminal coupled to a series connected inductor and capacitor. The voltage converter also includes a charging switch coupled to the charging control terminal of the power switch, a discharging switch coupled to the discharging control terminal of the power switch, and a feedback circuit coupling the power switch, charging switch and discharging switch to a node at which the capacitor and inductor are connected. During a charging phase, the charging switch couples the capacitor to the charging control terminal of the power switch, and during a discharging phase, the discharging switch couples the capacitor to the discharging control terminal of the power switch.
摘要:
The present application relates to a power supply module which is operable in a switch mode and in a linear mode. The power supply module includes a detector for detecting the presence of an inductor at an output node of the power supply module If an inductor is detected, the detector outputs a signal indicating the presence of the inductor, and the power supply module selects the switch mode as its operating mode. If no inductor is detected, the detector outputs a signal indicative of the absence of an inductor and the power supply module selects its linear mode as its operating mode.
摘要:
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.
摘要:
A method of converting a plurality of input signals on first and second converters, such that the first and second converters are both used when the plurality of signals comprises two signals, characterised in that said method comprises: selecting more than two input signals; determining the type of each selected signal; combining any signals having the same type to form a combined signal; converting one type of signal with the first converter; converting a second type of signal with the second converter wherein the first or second type signals is a combined signal.
摘要:
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.
摘要:
A low drop-out voltage regulator having a pass device (Mp), an error amplifier (M1-M51) and a double regulation loop including DC feedback loop (R1, R2) and an AC feedback loop (Rf, Cf) including a high pass filter (Cf). Combining these two loops creates an ultra low frequency internal pole which makes the regulator stable substantially independent of the output bypass capacitor's value. This provides the following advantages: allows the use of very low bypass capacitors; allows to extend the PSRR frequency behavior; allows an increase in the regulator's efficiency (reduced power consumption on heavy loads).
摘要:
A voltage supply circuitry is capable of coupling to wired audio headset circuitry and configurable to operate in a first mode, wherein the voltage supply circuitry provides a voltage supply to the wired audio headset functionality circuitry. The voltage supply circuitry is further capable of coupling to visual indication circuitry and further configurable to operate in a second mode, wherein the voltage supply circuitry provides a voltage supply to the visual indication circuitry.
摘要:
A voltage converter includes a power switch having respective charging and discharging control terminals, and an output terminal coupled to a series connected inductor and capacitor. The voltage converter also includes a charging switch coupled to the charging control terminal of the power switch, a discharging switch coupled to the discharging control terminal of the power switch, and a feedback circuit coupling the power switch, charging switch and discharging switch to a node at which the capacitor and inductor are connected. During a charging phase, the charging switch couples the capacitor to the charging control terminal of the power switch, and during a discharging phase, the discharging switch couples the capacitor to the discharging control terminal of the power switch.
摘要:
A drain extended MOS transistor configured to operate in a gate-depletion regime. Devices comprising such transistors are described together with fabrication processes for such devices and transistors.
摘要:
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.