18999985. Random Modulation of Charge-Pump Noise Phases (GOOGLE LLC)
Random Modulation of Charge-Pump Noise Phases
Organization Name
Inventor(s)
Qingfei Chen of Mountain View CA US
Kwang Oh Kim of San Jose CA US
Random Modulation of Charge-Pump Noise Phases
This abstract first appeared for US patent application 18999985 titled 'Random Modulation of Charge-Pump Noise Phases
Original Abstract Submitted
Techniques and apparatuses are described that implement random modulation of charge-pump noise phases to reduce structured noise induced by the charge pump. In an example aspect, a correlated double sampling (CDS) circuit is coupled to a pixel array including at least one pixel circuit. The CDS circuit receives an input signal generated by the at least one pixel circuit from the pixel array and samples a reset component of the input signal during a first sampling time to generate a reset component sample. The first sampling time is at a first offset from a reset control signal and prior to a settling time of the at least one pixel circuit. The CDS circuit samples a signal component of the input signal during a second sampling time to generate a signal component sample and determines an output signal based on the reset component sample and the signal component sample.