Analysis of Dynamic Range, Linearity, and Noise of a Pulse-Frequency Modulation Pixel

2012 ◽  
Vol 59 (10) ◽  
pp. 2675-2681 ◽  
Author(s):  
Tsung-Hsun Tsai ◽  
Richard Hornsey
Keyword(s):  
Frequency Modulation ◽  
Dynamic Range ◽  
Pulse Frequency ◽  
Pulse Frequency Modulation

scholarly journals CMOS Digital Pixel Sensors With In-Pixel Analog-To-Digital Conversion

2021 ◽  
Author(s):  
Yong Chen
Keyword(s):  
Frequency Modulation ◽  
Dynamic Range ◽  
Pulse Frequency ◽  
Reference Voltage ◽  
Pulse Frequency Modulation ◽  
Digital Conversion ◽  
Analog To Digital ◽  
Analog To Digital Conversion ◽  
Pixel Sensors ◽  
Digital Pixel

This thesis deals with the designing of CMOS image sensors with in-pixel analog-to-digital conversion. A 2-stage memory write scheme for Pulse-Width-Modulation digital pixel sensors is proposed. It utilizes the characteristics of Gray-code counters and partitions a single data write operation into two separated write operations such that the size of the in-pixel memory can be significantly reduced. A Pulse-Frequency-Modulation pixel significantly reduces the integration time without sacrificing the dynamic range. Finally, a Pulse-Frequency-Modulation Digital Pixel Sensor with an in-pixel variable reference voltage is proposed. As compared with conventional Pulse-Frequency-Modulation pixels, the proposed architecture improves the dynamic range by adaptively adjusting the reference voltage in the pixel. All proposed digital pixel sensors are designed in TSMC-0.18μm 6-Metal 1-Poly 1.8 V CMOS technology and analyzed using Spectre from Cadence Design Systems with BSIM3V3 device models. The effectiveness of the proposed digital pixel sensors is validated using simultation.

scholarly journals CMOS Digital Pixel Sensors With In-Pixel Analog-To-Digital Conversion

2021 ◽  
Author(s):  
Yong Chen
Keyword(s):  
Frequency Modulation ◽  
Dynamic Range ◽  
Pulse Frequency ◽  
Reference Voltage ◽  
Pulse Frequency Modulation ◽  
Digital Conversion ◽  
Analog To Digital ◽  
Analog To Digital Conversion ◽  
Pixel Sensors ◽  
Digital Pixel

This thesis deals with the designing of CMOS image sensors with in-pixel analog-to-digital conversion. A 2-stage memory write scheme for Pulse-Width-Modulation digital pixel sensors is proposed. It utilizes the characteristics of Gray-code counters and partitions a single data write operation into two separated write operations such that the size of the in-pixel memory can be significantly reduced. A Pulse-Frequency-Modulation pixel significantly reduces the integration time without sacrificing the dynamic range. Finally, a Pulse-Frequency-Modulation Digital Pixel Sensor with an in-pixel variable reference voltage is proposed. As compared with conventional Pulse-Frequency-Modulation pixels, the proposed architecture improves the dynamic range by adaptively adjusting the reference voltage in the pixel. All proposed digital pixel sensors are designed in TSMC-0.18μm 6-Metal 1-Poly 1.8 V CMOS technology and analyzed using Spectre from Cadence Design Systems with BSIM3V3 device models. The effectiveness of the proposed digital pixel sensors is validated using simultation.

Demonstration of 6-bit, 0.20-mVpp Quasi-Triangle Voltage Waveform Generator Based on Pulse-Frequency Modulation

2014 ◽  
Vol E97.C (3) ◽  
pp. 194-197 ◽  
Author(s):  
Yoshitaka TAKAHASHI ◽  
Hiroshi SHIMADA ◽  
Masaaki MAEZAWA ◽  
Yoshinao MIZUGAKI
Keyword(s):  
Frequency Modulation ◽  
Pulse Frequency ◽  
Waveform Generator ◽  
Voltage Waveform ◽  
Pulse Frequency Modulation
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