A low power autonomous peripheral operative to receive configuration or command data and to perform the designated operation(s) without interaction of a processor.

A circuit device includes an oscillation signal generation circuit that generates an oscillation signal by using a resonator and a processing circuit that estimates an aging characteristic of the oscillation frequency of the resonator based on the result of comparison between the phase of a reference signal based on a satellite signal transmitted from a navigation satellite and the phase of a clock signal based on the oscillation signal. The processing circuit estimates the aging characteristic based on an index value representing the reliability of the state of the received satellite signal and the result of the phase comparison.

A circuit device includes an oscillation signal generation circuit that generates an oscillation signal by using a resonator and a processing circuit that estimates an aging characteristic of the oscillation frequency of the resonator based on the result of comparison between the phase of a reference signal based on a satellite signal transmitted from a navigation satellite and the phase of a clock signal based on the oscillation signal. The processing circuit estimates the aging characteristic based on an index value representing the reliability of the state of the received satellite signal and the result of the phase comparison.

A low power autonomous peripheral operative to receive configuration or command data and to perform the designated operation(s) without interaction of a processor.

A low power autonomous peripheral operative to receive configuration or command data and to perform the designated operation(s) without interaction of a processor.

A Bluetooth Low-Energy (BLE) transmitter is presented for used in ultra-low-power radios in short range IoT applications. The power consumption of state-of-the-art BLE transmitter has been limited by the relatively power-hungry local oscillator due to the use of LC oscillators for superior phase noise performance. This disclosure addresses this issue by analyzing the phase noise limit of a BLE TX and proposes a ring oscillator-based solution for power and cost savings. The proposed transmitter features: 1) a wideband all-digital phase locked loop (ADPLL) featuring an f.sub.RF/4 RO, with an embedded 5-bit TDC; 2) a 4 frequency edge combiner to generate the 2.4 GHz signal; and 3) a switch-capacitor digital PA optimized for high efficiency at low transmit power levels. These not only help reduce the power consumption and improve phase noise performance, but also enhance the transmitter efficiency for short range applications.

A circuit device includes an oscillation signal generation circuit that generates an oscillation signal by using a resonator and a processing circuit that estimates an aging characteristic of the oscillation frequency of the resonator based on the result of comparison between the phase of a reference signal based on a satellite signal transmitted from a navigation satellite and the phase of a clock signal based on the oscillation signal. The processing circuit estimates the aging characteristic based on an index value representing the reliability of the state of the received satellite signal and the result of the phase comparison.

A circuit device includes an oscillation signal generation circuit that generates an oscillation signal by using a resonator and a processing circuit that estimates an aging characteristic of the oscillation frequency of the resonator based on the result of comparison between the phase of a reference signal based on a satellite signal transmitted from a navigation satellite and the phase of a clock signal based on the oscillation signal. The processing circuit estimates the aging characteristic based on an index value representing the reliability of the state of the received satellite signal and the result of the phase comparison.

An adaptive voltage converter adapted to compensate for the exponential sensitivities of sub-threshold and near-threshold circuits. The converter can change its power/performance characteristics between different energy modes. The converter may comprise two or more voltage converters/regulators. A multiplexing circuit selects between the outputs of the several converters/regulators depending on the state of a control signal generated by a control facility. The converter is specially adapted to change the output of each converter/regulator based on a number of variables, including, for example, process corner, temperature and input voltage.

An adaptive voltage converter adapted to compensate for the exponential sensitivities of sub-threshold and near-threshold circuits. The converter can change its power/performance characteristics between different energy modes. The converter may comprise two or more voltage converters/regulators. A multiplexing circuit selects between the outputs of the several converters/regulators depending on the state of a control signal generated by a control facility. The converter is specially adapted to change the output of each converter/regulator based on a number of variables, including, for example, process corner, temperature and input voltage.