Abstract: An oscillator drive circuit and a trim circuit are implemented inside an integrated circuit of a sensor. The drive circuit provides an oscillating drive signal at a resonant frequency to drive a movable mass of the sensor. The drive circuit includes a phase shift circuit having an input for receiving a first signal indicative of an oscillation of the movable mass and having an output. The phase shift circuit adds a phase shift component to the first signal and produces a second signal shifted in phase by the phase shift component. The trim circuit includes a first comparator for receiving the first signal, a second comparator for receiving the second signal, and a processing element. The processing element determines a phase lag between the first and second signals and produces trim code for use by the phase shift circuit, the trim code being configured to adjust the phase shift component.

Abstract: A system in a device includes an electronic module configured to perform a function associated with the device, a power generation apparatus for generating electrical energy in response to motion of the device, and a switch element interposed between the electronic module and the power generation device. The switch element switches from a first state to a second state when the power generation apparatus generates the electrical energy. The electronic module is in a powered-off mode in which a power storage device is disconnected from the electronic module whenever the switch element is in the first state. The electronic module is switched to a powered-on mode in which the power storage device is in electrically connected to the electronic module whenever the switch element is in the second state.

Abstract: A compensated three stage amplifier having high gain as well as high speed is disclosed. The amplifier comprises a NMC and NGCC compensated cascaded three stage amplifier for receiving an input signal and for providing an amplified output signal in dependence thereupon. An extra feed forward transconductance stage extending from the input port of a first gain stage to the output port of a second gain stage of the amplifier is used in order to cancel one of two non-dominant poles in the transfer function of the amplifier with the additional zero introduced by the extra signal path. This results in a transfer function for a three stage cascaded amplifier having only two poles, which is highly desirable by allowing design of such amplifiers providing stable operation at high gain as well as high speed.

Abstract: A compensated three stage amplifier having high gain as well as high speed is disclosed. The amplifier comprises a NMC and NGCC compensated cascaded three stage amplifier for receiving an input signal and for providing an amplified output signal in dependence thereupon. An extra feed forward transconductance stage extending from the input port of a first gain stage to the output port of a second gain stage of the amplifier is used in order to cancel one of two non-dominant poles in the transfer function of the amplifier with the additional zero introduced by the extra signal path. This results in a transfer function for a three stage cascaded amplifier having only two poles, which is highly desirable by allowing design of such amplifiers providing stable operation at high gain as well as high speed.