An image sensing device includes: a first source ramp voltage generation circuit suitable for generating a first source ramp voltage that is adjusted a first voltage unit for each first period, a second source ramp voltage generation circuit suitable for generating a second source ramp voltage that is adjusted the first voltage unit for each first period and has a set voltage difference from the first source ramp voltage, and a ramp voltage generation circuit suitable for generating a ramp voltage that is adjusted a second voltage unit that is less than the first voltage unit for each second period that is shorter than the first period based on the first and second source ramp voltages and a plurality of first control signals.

An image sensing device includes a coarse current generation circuit suitable for generating a coarse ramp current adjusted to a coarse level for a single ramp period, a fine current generation circuit suitable for generating a fine ramp current adjusted to a fine level for the single ramp period, and a current-to-voltage conversion circuit suitable for generating a ramp voltage corresponding to a resultant current of the coarse ramp current and the fine ramp current for the single ramp period.

The present invention provides an arbitrary waveform generator based on instruction architecture. To deal with the feature that the instructions and waveform data of the AWG are coupled in the prior art, an instruction set based waveform synthesis controller is employed, and substitutes for the sequence wave generator in the present invention, i.e. an arbitrary waveform generator based on instruction architecture. Thus the time-sharing scheduling in reading the waveform synthesis instruction and the segment waveform data is realized, and the complexity of the hardware is reduced, so that the AWG in present invention can synthesize and generate a complex sequence wave rapidly and efficiently.

A first flipflop outputs a first signal synchronized with a first clock signal, a second flipflop outputs a second signal synchronized with a second clock signal, and a third flipflop outputs a third signal synchronized with a third clock signal. The second flipflop includes first to third transistors. In the first transistor, the second clock signal is input to a first terminal and the second signal is output from a second terminal. In the second transistor, a first signal is input to a first terminal, a second terminal is electrically connected to a gate of the first transistor, and the first clock signal is input to a gate. In the third transistor, the third signal is input to a first terminal, a second terminal is electrically connected to the gate of the first transistor, and the third clock signal is input to a gate.

The present technology relates to an image pickup device and an electronic apparatus capable of preventing degradation of the picture quality. A plurality of current sources can be selectively connected to an output terminal for outputting a reference signal having a level that varies, and a plurality of terminating resistors are connected to the output terminal. The terminating resistors that are to supply current of current sources that are connected to the output terminal are connected by a plurality of switches, and current of current sources that are not connected to the output terminal is supplied to the switches. The present technology can be applied, for example, to image pickup devices that perform AD conversion using a reference signal and so forth.

A first flipflop outputs a first signal synchronized with a first clock signal, a second flipflop outputs a second signal synchronized with a second clock signal, and a third flipflop outputs a third signal synchronized with a third clock signal. The second flipflop includes first to third transistors. In the first transistor, the second clock signal is input to a first terminal and the second signal is output from a second terminal. In the second transistor, a first signal is input to a first terminal, a second terminal is electrically connected to a gate of the first transistor, and the first clock signal is input to a gate. In the third transistor, the third signal is input to a first terminal, a second terminal is electrically connected to the gate of the first transistor, and the third clock signal is input to a gate.

A spread spectrum clock generator circuit includes a phase comparator; an oscillator to output an output clock signal; a phase selector to select one of phases equally dividing one cycle of the output clock signal, and to generate a phase shift clock signal having a rising edge in the selected phase; and a phase shift controller to control the phase selector. The phase shift controller generates a variable phase shift amount; determines the phase of the rising edge so that the cycle of the phase shift clock signal has a length changed from the cycle of the output clock signal by the variable phase shift amount added with a fixed phase shift amount; and changes a setting of an SS modulation profile if the selected phase exceeds an upper limit, falls below a lower limit, or is within the upper and lower limits.

A pulse generator circuit includes a charge pump having a charge pump output. A voltage divider is coupled to the charge pump output. The voltage divider has a voltage divider output. An error amplifier has a first error amplifier input and a second error amplifier input. The first error amplifier input is coupled to the voltage divider output. A dependent current source circuit has a first input coupled to the charge pump output, a second input coupled to the voltage divider output, and a third input coupled to the second error amplifier input. The dependent current source is configured to cause a current to flow from the charge pump output that is proportional to a difference between a first voltage at the voltage divider output and a second voltage at the second error amplifier input.

A signal modulation apparatus includes: a reference signal generator that generates an analog reference signal by removing at least one harmonic signal component corresponding to at least one higher-order frequency from a triangular wave signal; a modulation signal generator that performs pulse width modulation for comparing the analog reference signal with an analog input signal, thereby to generate an analog modulation signal; a digital signal converter that converts the analog modulation signal to a digital output signal; and a nonlinear converter that performs nonlinear conversion corresponding to waveform conversion for converting the triangular wave signal to the analog reference signal, on the digital output signal or the analog input signal.

The present invention relates to a method of simulating an initial component of a signal to approximate a component of a reference signal, the method characterized by the steps of: i. generating a source signal which includes at least one harmonic component, and ii. determining the average amplitude and duration of the source signal, and iii. referencing the amplitude of the reference signal component to be simulated, and iv. integrating the source signal over a period of time sufficient to produce a value for the signal component amplitude approximate to the reference signal component amplitude.