An event detection controller for a circuit system controlled by a pulse wave modulation signal, can perform a specific event handling when a specific event is detected, wherein the specific event handling includes stopping a pulse wave modulation device, starting up the stopped pulse wave modulation device, controlling the pulse wave modulation device to change the pulse wave modulation signal, outputting a wake-up signal to wake up the circuit system, controlling the pulse detector to change its detection configuration, changing a cumulative occurrences number of the specific pattern of an event discrimination module, outputting a control signal or a first data signal to a peripheral device through a bus connected to an event response module and/or requesting the peripheral device to send a second data signal through the bus.

A circuit, for generating ultrahigh-precision digital pulse signals comprises: a pulse edge control circuit used for delaying a signal on an input pin and accurately controlling positions of a rising edge and a falling edge of the pulse signal to accurately control the width of pulses and generate ultrahigh-precision pulses; a static calibration circuit used for calculating step size information representing the relationship between a work clock period of a system and a delay of delay cells in the pulse edge control circuit when the system is powered on to work, and storing the step size information, wherein the step size information is the number of delay cells through which the signal is propagated and passes within one system clock period; and a dynamic calibration circuit used for dynamically calculating step size information when a rising edge or a falling edge of each pulse in the input pin arrives.

A circuit, for generating ultrahigh-precision digital pulse signals comprises: a pulse edge control circuit used for delaying a signal on an input pin and accurately controlling positions of a rising edge and a falling edge of the pulse signal to accurately control the width of pulses and generate ultrahigh-precision pulses; a static calibration circuit used for calculating step size information representing the relationship between a work clock period of a system and a delay of delay cells in the pulse edge control circuit when the system is powered on to work, and storing the step size information, wherein the step size information is the number of delay cells through which the signal is propagated and passes within one system clock period; and a dynamic calibration circuit used for dynamically calculating step size information when a rising edge or a falling edge of each pulse in the input pin arrives.

A duty timing detector includes: a control logic, the control logic being configured to: receive an input toggle signal and an output toggle signal that corresponds to the input toggle signal, and generate a difference signal using a difference between a duty of the input toggle signal and a duty of the output toggle signal; a first low-pass filter configured to output a DC input voltage based on a pulse width of the input toggle signal; a second low-pass filter configured to output a DC difference voltage based on a pulse width of the difference signal; a compensation circuit configured to compensate the duty of the output toggle signal using the DC input voltage and the DC difference voltage; and an oscillator configured to generate a duty-compensated output toggle signal, and to provide the duty-compensated output toggle signal to the control logic.

A duty timing detector includes: a control logic, the control logic being configured to: receive an input toggle signal and an output toggle signal that corresponds to the input toggle signal, and generate a difference signal using a difference between a duty of the input toggle signal and a duty of the output toggle signal; a first low-pass filter configured to output a DC input voltage based on a pulse width of the input toggle signal; a second low-pass filter configured to output a DC difference voltage based on a pulse width of the difference signal; a compensation circuit configured to compensate the duty of the output toggle signal using the DC input voltage and the DC difference voltage; and an oscillator configured to generate a duty-compensated output toggle signal, and to provide the duty-compensated output toggle signal to the control logic.

A pulse control device 10 comprises: a switch output unit 100 which generates a pulse output voltage Vo from a direct-current input voltage Vi and supplies the pulse output voltage Vo to a load (such as a relay coil 21 of a mechanical relay 20); a low-pass filter unit 300 which receives a feedback input of the pulse output voltage Vo and generates a feedback voltage Vfb; and an output feedback control unit 200 which receives an input of the feedback voltage Vfb and controls the switch output unit 100 so that an average value of the pulse output voltage Vo becomes constant. The low-pass filter unit 300 may be configured without a coil.

A pulse control device 10 comprises: a switch output unit 100 which generates a pulse output voltage Vo from a direct-current input voltage Vi and supplies the pulse output voltage Vo to a load (such as a relay coil 21 of a mechanical relay 20); a low-pass filter unit 300 which receives a feedback input of the pulse output voltage Vo and generates a feedback voltage Vfb; and an output feedback control unit 200 which receives an input of the feedback voltage Vfb and controls the switch output unit 100 so that an average value of the pulse output voltage Vo becomes constant. The low-pass filter unit 300 may be configured without a coil.

The present disclosure provides a PWM circuit, a modulation method, and an electronic device, and relates to the field of communication technologies. In the PWM circuit, a control word providing circuit can generate, based on an obtained target duty cycle, two target frequency control words with a ratio of the target duty cycle, and output the two target frequency control words to a pulse generation circuit; and the pulse generation circuit can output a target pulse signal with the target duty cycle under the control of the two target frequency control words. Because the control word providing circuit can generate the target frequency control words based on the desired target duty cycle, the pulse generation circuit can reliably generate the pulse signal with the target duty cycle based on the target frequency control words. In this way, the PWM circuit can flexibly generate the pulse signal.

The present disclosure provides a PWM circuit, a modulation method, and an electronic device, and relates to the field of communication technologies. In the PWM circuit, a control word providing circuit can generate, based on an obtained target duty cycle, two target frequency control words with a ratio of the target duty cycle, and output the two target frequency control words to a pulse generation circuit; and the pulse generation circuit can output a target pulse signal with the target duty cycle under the control of the two target frequency control words. Because the control word providing circuit can generate the target frequency control words based on the desired target duty cycle, the pulse generation circuit can reliably generate the pulse signal with the target duty cycle based on the target frequency control words. In this way, the PWM circuit can flexibly generate the pulse signal.

An aerosol delivery device is provided. The aerosol delivery device includes a power source, an aerosol production component, a sensor to produce measurements of atmospheric air pressure in an air flow path through at least one housing, and a switch coupled to and between the power source and the aerosol production component. The aerosol delivery device also includes processing circuitry that determines a difference between the measurements of atmospheric air pressure and a reference atmospheric air pressure. Only when the difference is at least a threshold difference, the processing circuitry outputs a signal to cause the switch to switchably connect and disconnect an output voltage from the power source to the aerosol production component to adjust power provided to the aerosol production component to a power target that is variable according to a predetermined relationship between the difference and the power target.