10 results about "Ramp generator" patented technology

Circuits are disclosed for controlling voltage regulators. In general, one aspect disclosed features an electric circuit comprising: a digital ramp generator configured to generate a digital voltage ramp; a digital low-pass filter having an input electrically coupled to an output of the digital ramp generator and configured to low-pass filter the digital voltage ramp; a digital-to-analog converter having an input electrically coupled to an output of the digital low-pass filter and configured to generate an analog control signal based on the filtered digital voltage ramp; and a voltage regulator having an input electrically coupled to an output of the digital-to-analog converter and configured to regulate an output voltage based on the analog control signal and an input voltage of the voltage regulator.

An image sensor device may include an image pixel configured to generate a pixel signal based on a light, a ramp generator including a ramp source circuit configured to generate a raw ramp signal, a driving source circuit configured to generate a driving source signal, and a bandwidth control circuit configured to generate a driving signal by adjusting a bandwidth of the driving source signal, and a ramp buffering circuit configured to generate a ramp signal corresponding to the raw ramp signal based on the driving signal, a comparative amplifier configured to generate a comparison output signal based on the pixel signal and the ramp signal, and an analog-to-digital conversion circuit generating a digital signal corresponding to the light based on the comparison output signal.

The present application relates to the technical field of power plant production process automation, and discloses a coal mill air distribution warm grinding control method and device, electronic equipment and a storage medium. The method comprises the following steps: in the automatic mode, in response to the mill closing signal, the inlet cold air volume of the mill is increased by using a slope generator, and the outlet temperature of the mill is adjusted by a first PID regulator; when the inlet air volume is greater than or equal to a first air volume threshold, the inlet air volume and the outlet temperature are adjusted by the first PID regulator and a second PID regulator in a push-pull balance mode; when the inlet air volume is greater than or equal to a second air volume threshold and the outlet temperature is greater than or equal to a temperature threshold, the outlet temperature of the mill is adjusted by using a third PID regulator to schedule cold air, and the inlet air volume of the mill is adjusted by using a fourth PID regulator to schedule hot air. The present application realizes full-automatic control from the start to the normal operation of the coal layer burner, and eliminates the hidden danger of "misoperation" that may occur in the complex operation process by manual operation.

An apparatus is disclosed that includes a PWM ramp generator coupled between a switch node of a power converter and a first input of a comparator. The PWM ramp generator includes a first resistor and a first capacitor connected in series between the switch node and the first input of the comparator, and a second resistor and a second capacitor connected in parallel between the first input of the comparator and a feedback node. A PFM control circuit includes an error amplifier and a current zero-crossing detection comparator, where the error amplifier is coupled between a second input of the comparator and a reference node. The PFM control circuit is configured to generate a gate drive signal for the power converter when the power converter is configured to operate in a PFM mode.

The present disclosure relates to an arrangement of comparators (120). The comparators (120) of the arrangement are configured to operate in parallel, with one input terminal of each of the comparators (120) connected to a common ramp generator (110). The arrangement further comprises a kickback compensation circuit (105) for subtracting a kickback compensation value from a digital value output by each of the comparators (120).

This disclosure relates to the field of image sensor technology, specifically to a high-linearity, low-power CMOS image sensor readout circuit. The readout circuit includes a ramp generator, a comparator, and a counter. The counter includes a first D flip-flop, a signal separation circuit, a high-order counter (MSB), and a low-order counter (LSB). The signal separation circuit separates the output signal of the first D flip-flop into a low-order high-frequency signal and a high-order low-frequency signal. The low-order counter (LSB) receives the low-order high-frequency signal, and the high-order counter (MSB) receives the high-order low-frequency signal. The high-order counter (MSB) and the low-order counter (LSB) each include several cascaded LS-type sampling counters. The LS-type sampling counter includes a first D flip-flop and a CDS circuit, wherein the CDS circuit is an OR gate circuit.

This invention provides a pixel column readout circuit and an image sensor. The pixel column readout circuit includes: a subtraction circuit, comprising a reset voltage sampling capacitor and a signal voltage sampling capacitor, one end of which is electrically connected to the output of a pixel signal generation circuit via two switches, and one end of which is connected via a third switch, and the other end via a fourth switch; a ramp generator, the output of which is connected to the subtraction circuit; a comparator circuit, including a first comparator, the negative input of which is electrically connected to the connection point of the reset voltage sampling capacitor and the fourth switch, and the positive input of which receives a fixed voltage; and a counter, electrically connected to the output of the comparator circuit. The ramp generator provided by this invention ensures linear output of the analog-to-digital conversion.

An image sensor apparatus can include: an image pixel configured to generate a pixel signal based on light; a ramp generator including: a ramp source circuit configured to generate an original ramp signal; a drive source circuit configured to generate a drive source signal; a bandwidth control circuit configured to generate a drive signal by adjusting a bandwidth of the drive source signal; and a ramp buffer circuit configured to generate a ramp signal corresponding to the original ramp signal based on the drive signal; a comparison amplifier configured to generate a comparison output signal based on the pixel signal and the ramp signal; and an analog-to-digital conversion circuit configured to generate a digital signal corresponding to the light based on the comparison output signal.

A ramp generator, capable of generating a ramp signal from an image sensor, includes a current controller, a bias voltage generator, and a ramp signal generator. The current controller adjusts a value of a reference current applied to a first node based on a plurality of control signals, and it adjusts a value of a current applied to a second node based on some control signals from among the plurality of control signals. The bias voltage generator generates a bias voltage based on a current mirrored according to the first node and the second node. The ramp signal generator generates a ramp signal based on the bias voltage.

This disclosure relates to an array of comparators (120). The comparators (120) in the array are configured to operate in parallel, with one input terminal of each comparator (120) connected to a common ramp generator (110). The array also includes a backflip compensation circuit (105) for subtracting a backflip compensation value from the digital value output by each comparator (120).