Abstract:
스위치드-커패시터적분기가개시된다. 상기스위치드-커패시터적분기는제1클락페이즈에서입력신호를샘플링하고제2클락페이즈에서샘플된입력신호를자신의증폭기를이용하여적분하고리셋동작시마다상기증폭기의입력단의전압을일정한리셋전압으로리셋시킨다. 상기리셋전압은상기증폭기의오프셋전압또는외부로부터공급된정전압일수 있다.
Abstract:
PURPOSE: An image sensor and an image processing system having the same are provided to regulate a supplied power and an input voltage with a voltage regulating circuit having a replica inverter of which the structure is identical to the structures of inverters in the delta-sigma modulator of a delta-sigma analog-digital converter. CONSTITUTION: An image sensor includes delta-sigma analog-digital converters (510-5n0) and a voltage regulating circuit (100). The delta-sigma analog-digital converter has a delta-sigma modulator implementing a delta-sigma modulation on an analog signal from a unit pixel, and converts the analog signal into a digital signal. The voltage regulating circuit has a replica inverter of which the structure is identical to the structure of at least one inverter in the delta-sigma modulator, and regulates a power and an input voltage supplied to the at least one inverter based on an electric current flowing in the replica inverter.
Abstract:
PURPOSE: An analog to digital converter and an image sensor including the same are provided to improve a working speed without the additional consumption of power or a circuit size by arranging a modulation unit including a plurality of modulators. CONSTITUTION: An analog to digital converter(1000) includes a modulation unit(1100) and a digital signal generation unit(1200). The modulation unit is arranged in one or more column lines from a plurality of column lines. The plurality of column lines respectively provides analog input signals. The modulation unit calculates the analog input signal provided from corresponding column lines. The modulation unit generates a digital bit stream signal corresponding to a part of digital signal bits in each stage. The digital signal generation unit generates a digital signal corresponding to the analog input signal by counting digital bit stream signals.
Abstract:
PURPOSE: A correlated double sampling circuit and an image sensor including the same are provided to eliminate a need of a separate circuit for subtraction operation necessary for correlated double sampling. CONSTITUTION: A delta-sigma modulator(110) performs delta-sigma modulation in an input signal. A selection circuit(120) outputs a modulation signal or outputs the inverted signal of the modulation signal. A cumulative circuit(130) performs a cumulative operation in either one of the modulation signal and the inverted signal during a first operation phase. The cumulative circuit performs a cumulative operation in the other one of the modulation signal and the inverted signal during a second operation phase.
Abstract:
PURPOSE: An incremental delta-sigma analog to digital converter and devices having the same are provided to generate an operand by using a down counter implementing the down count operation in response to the clock signal. CONSTITUTION: A delta-sigma analog to digital converter comprises a delta-sigma modulator(12), an operand generator(18-1), and a selecting circuit(14-1). The operand generator generates the operand in response to the clock signal. A selection circuit selectively transmits the operand to an adder(16) according to the output value outputted from the delta-signal modulator in response to the clock signal.
Abstract:
스위치드-커패시터적분기가개시된다. 상기스위치드-커패시터적분기는제1클락페이즈에서입력신호를샘플링하고제2클락페이즈에서샘플된입력신호를자신의증폭기를이용하여적분하고리셋동작시마다상기증폭기의입력단의전압을일정한리셋전압으로리셋시킨다. 상기리셋전압은상기증폭기의오프셋전압또는외부로부터공급된정전압일수 있다.