Abstract: Systems and methods for amplitude loop control for oscillators. In some embodiments, an electronic circuit may include oscillator circuitry configured to produce a periodic signal, and control circuitry operably coupled to the oscillator circuitry, the control circuitry including switched capacitor circuitry configured to determine a difference between maximum and minimum peak voltage values of the periodic signal, the control circuit configured to control a voltage amplitude of the periodic signal based upon the difference. In other embodiments, a method may include receiving a clock signal from a clock generator, determining, using a switched capacitor circuit, a first peak voltage value of the clock signal, determining, using the switched capacitor circuit, a second peak voltage value of the clock signal, and controlling a bias current applied to the clock generator based upon a difference between the first and second peak voltage values.

Abstract: Systems and methods for amplitude loop control for oscillators. In some embodiments, an electronic circuit may include oscillator circuitry configured to produce a periodic signal, and control circuitry operably coupled to the oscillator circuitry, the control circuitry including switched capacitor circuitry configured to determine a difference between maximum and minimum peak voltage values of the periodic signal, the control circuit configured to control a voltage amplitude of the periodic signal based upon the difference. In other embodiments, a method may include receiving a clock signal from a clock generator, determining, using a switched capacitor circuit, a first peak voltage value of the clock signal, determining, using the switched capacitor circuit, a second peak voltage value of the clock signal, and controlling a bias current applied to the clock generator based upon a difference between the first and second peak voltage values.

Abstract: Apparatus, systems and methods are provided for protecting a processing system from electromagnetic interference. An integrated circuit comprises a sensing arrangement configured to sense an interference signal and an interference detection module coupled to the sensing arrangement. The interference detection module is configured to detect when a power level associated with the interference signal is greater than a threshold value. In one embodiment, the interference detection module generates an interrupt for a processing system when the power level associated with the interference signal is greater than the threshold value.

Abstract: Apparatus, systems and methods are provided for protecting a processing system from electromagnetic interference. An integrated circuit comprises a sensing arrangement configured to sense an interference signal and an interference detection module coupled to the sensing arrangement. The interference detection module is configured to detect when a power level associated with the interference signal is greater than a threshold value. In one embodiment, the interference detection module generates an interrupt for a processing system when the power level associated with the interference signal is greater than the threshold value.

Abstract: A voltage detector device is disclosed that includes a coarse-range voltage detector and a fine-range voltage detector. The fine-range voltage detector is configured to remain inactive, so that it consumes a relatively small amount of power, while a monitored voltage is outside a first specified range. In response to determining that the monitored voltage is within the first specified range, the coarse-range voltage detector activates the fine-range voltage detector so that it can monitor the voltage. In response to the fine-voltage monitor determining the voltage falls within a second specified range, the fine-range voltage detector provides a signal to a functional module of an electronic device so that the functional module can provide a defined response, such as executing an interrupt routine.

Abstract: A voltage detector device is disclosed that includes a coarse-range voltage detector and a fine-range voltage detector. The fine-range voltage detector is configured to remain inactive, so that it consumes a relatively small amount of power, while a monitored voltage is outside a first specified range. In response to determining that the monitored voltage is within the first specified range, the coarse-range voltage detector activates the fine-range voltage detector so that it can monitor the voltage. In response to the fine-voltage monitor determining the voltage falls within a second specified range, the fine-range voltage detector provides a signal to a functional module of an electronic device so that the functional module can provide a defined response, such as executing an interrupt routine.