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Correlated double sampling (CDS) is a method to measure electrical values such as voltages or currents that allows removing an undesired offset. It is used often when measuring sensor outputs. The output of the sensor is measured twice: once in a known condition and once in an unknown condition. The value measured from the known condition is then subtracted from the unknown condition to generate a value with a known relation to the physical quantity being measured.

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  • Correlated double sampling (CDS) is a method to measure electrical values such as voltages or currents that allows removing an undesired offset. It is used often when measuring sensor outputs. The output of the sensor is measured twice: once in a known condition and once in an unknown condition. The value measured from the known condition is then subtracted from the unknown condition to generate a value with a known relation to the physical quantity being measured. This is commonly used in switched-capacitor operational amplifiers to effectively double the gain of the charge sharing opamp, while adding an extra phase. When used in imagers, correlated double sampling is a noise reduction technique in which the reference voltage of the pixel (i.e., the pixel’s voltage after it is reset) is subtracted from the signal voltage of the pixel (i.e., the pixel’s voltage at the end of integration) at the end of each integration period, to cancel kTC noise (the thermal noise associated with the sensor's capacitance). (en)
  • El muestreo doble correlacionado es una técnica empleada para la medición de señales eléctricas tales como tensiones o corrientes, que permite la eliminación de desplazamientos indeseados de CC (DC offset). Esta técnica es usada frecuentemente en la medición de datos de salida de los sensores electrónicos. La salida del sensor es medida dos veces: la primera vez se mide operando en condiciones conocidas, y la segunda vez, es medida operando en condiciones desconocidas. El valor medido en condiciones conocidas se resta del valor medido en condiciones desconocidas, generando de esta forma una relación conocida con la cantidad física que está siendo medida. * Datos: Q5172837 (es)
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  • Correlated double sampling (CDS) is a method to measure electrical values such as voltages or currents that allows removing an undesired offset. It is used often when measuring sensor outputs. The output of the sensor is measured twice: once in a known condition and once in an unknown condition. The value measured from the known condition is then subtracted from the unknown condition to generate a value with a known relation to the physical quantity being measured. (en)
  • El muestreo doble correlacionado es una técnica empleada para la medición de señales eléctricas tales como tensiones o corrientes, que permite la eliminación de desplazamientos indeseados de CC (DC offset). Esta técnica es usada frecuentemente en la medición de datos de salida de los sensores electrónicos. La salida del sensor es medida dos veces: la primera vez se mide operando en condiciones conocidas, y la segunda vez, es medida operando en condiciones desconocidas. El valor medido en condiciones conocidas se resta del valor medido en condiciones desconocidas, generando de esta forma una relación conocida con la cantidad física que está siendo medida. (es)
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  • Muestreo doble correlacionado (es)
  • Correlated double sampling (en)
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