A relaxation oscillator circuit includes a current mirror configured to receive the input current from the and generate a plurality of starved currents, a Schmitt trigger configured to be current starved by a first starved current of the plurality of starved currents and a plurality of inverters configured to receive a Schmitt trigger output signal and generate an output clock signal, the inverters including a plurality of current starved inverters that are current starved by a second starved current of the plurality of starved currents, the plurality of current starved inverters receiving the Schmitt trigger output signal and generating a first inverter output signal, upon which an output clock signal is based. The relaxation includes a capacitor configured to charge or discharge in response to the output clock signal and a switching module configured to provide current from the current source based on the output clock signal.

A relaxation oscillator circuit includes a current mirror configured to receive the input current from the and generate a plurality of starved currents, a Schmitt trigger configured to be current starved by a first starved current of the plurality of starved currents and a plurality of inverters configured to receive a Schmitt trigger output signal and generate an output clock signal, the inverters including a plurality of current starved inverters that are current starved by a second starved current of the plurality of starved currents, the plurality of current starved inverters receiving the Schmitt trigger output signal and generating a first inverter output signal, upon which an output clock signal is based. The relaxation includes a capacitor configured to charge or discharge in response to the output clock signal and a switching module configured to provide current from the current source based on the output clock signal.

An apparatus for measuring the capacitance to be measured is proposed. It comprises a first sine-wave oscillator, the measuring oscillator, and a second sine-wave oscillator, the reference oscillator. The frequency of the output signal of the measuring oscillator, hereinafter also referred to as measuring frequency, is dependent on the capacitance to be measured. The frequency of the output signal of the reference oscillator, hereinafter also referred to as reference frequency, is dependent on a reference capacitance. The apparatus comprises a sub-apparatus which produces the ratio of the frequency value of the frequency of the output signal of the reference oscillator and the frequency value of the frequency of the output signal of the measuring oscillator and subsequently squares this ratio to provide the result of this squaring as a measured value.

An apparatus for measuring the capacitance to be measured is proposed. It comprises a first sine-wave oscillator, the measuring oscillator, and a second sine-wave oscillator, the reference oscillator. The frequency of the output signal of the measuring oscillator, hereinafter also referred to as measuring frequency, is dependent on the capacitance to be measured. The frequency of the output signal of the reference oscillator, hereinafter also referred to as reference frequency, is dependent on a reference capacitance. The apparatus comprises a sub-apparatus which produces the ratio of the frequency value of the frequency of the output signal of the reference oscillator and the frequency value of the frequency of the output signal of the measuring oscillator and subsequently squares this ratio to provide the result of this squaring as a measured value.

An oscillation device includes an oscillator and a logic circuit. The oscillator generates an output oscillation signal. The logic circuit controls the oscillator according to the output oscillation signal, such that the output oscillation signal includes two different oscillation periods. The oscillation device may be used as a temperature-to-frequency converter without any bandgap reference circuit.

An oscillation device includes an oscillator and a logic circuit. The oscillator generates an output oscillation signal. The logic circuit controls the oscillator according to the output oscillation signal, such that the output oscillation signal includes two different oscillation periods. The oscillation device may be used as a temperature-to-frequency converter without any bandgap reference circuit.

A relaxation oscillator can provide a smaller and cheaper alternative to a crystal oscillator circuit in a wide variety of applications. A sawtooth relaxation oscillator can include overshoot error integration. Separate and distinct oscillator capacitor charging, overshoot error integration, and reset phases can be provided using separate comparators for first and second oscillation capacitors. Potential advantages can include high accuracy high-frequency clock, convenient trimming during initial calibration, clock frequency stability over temperature and time, fast startup with low overshoot, high power supply rejection, low power, or low noise/jitter. The oscillator can charge an oscillation capacitor up to a target voltage, then interrupt charging before beginning an error integration phase that adjusts the target voltage by integrating an overshoot error of a voltage on the oscillation capacitor. After completing the overshoot error integration, the voltage on the oscillation capacitor can be reset. The techniques described are believed to be capable of improving clock frequency accuracy and other characteristics.

A circuit device includes an oscillation circuit configured to cause a resonator to oscillate, a clock signal output circuit configured to output a clock signal based on an oscillation signal from the oscillation circuit, a temperature compensation circuit configured to perform temperature compensation on an oscillation frequency of the oscillation signal, a low-potential-side power supply pad to which low-potential-side electric power is supplied, a high-potential-side power supply pad to which high-potential-side electric power is supplied, and an inter-power-supply capacitor provided between a low-potential-side power supply line electrically continuous with the low-potential-side power supply pad and a high-potential-side power supply line electrically continuous with the high-potential-side power supply pad. The inter-power-supply capacitor is formed of at least two metal layers provided in a region where the temperature compensation circuit is disposed in a plan view.

A circuit device includes an oscillation circuit configured to cause a resonator to oscillate, a clock signal output circuit configured to output a clock signal based on an oscillation signal from the oscillation circuit, a temperature compensation circuit configured to perform temperature compensation on an oscillation frequency of the oscillation signal, a low-potential-side power supply pad to which low-potential-side electric power is supplied, a high-potential-side power supply pad to which high-potential-side electric power is supplied, and an inter-power-supply capacitor provided between a low-potential-side power supply line electrically continuous with the low-potential-side power supply pad and a high-potential-side power supply line electrically continuous with the high-potential-side power supply pad. The inter-power-supply capacitor is formed of at least two metal layers provided in a region where the temperature compensation circuit is disposed in a plan view.

A Geiger-Mueller charge particle rate measurement system includes a clock management unit in combination with multiple oscillators and rate feedback controller to allow for reactive switching between the different oscillator frequencies to optimize system use. Controlling the clock management unit to send the appropriate frequency (clock signal) to the timers in response to measured rate date from the rate feedback controller facilitates operation at different clock speeds, which helps reduce power consumption when operated at lower speeds.