A digitally controlled linear voltage regulator in a 65nm CMOS process

Fully digitalized switch-mode LED driver without ADC

“…The analog control systems should require too much complex hardware circuit even though these systems have two principal merits such as a low cost design and a wide system bandwidth [3]. Several research activities about digitalized DC-DC converters have been successfully reported [3], [4]. These digitalized systems have several merits of good noise immunity, insensitivity to process variation and ambient conditions, more flexible design to other processes, and good compatibility [3], [4].…”

“…Several research activities about digitalized DC-DC converters have been successfully reported [3], [4]. These digitalized systems have several merits of good noise immunity, insensitivity to process variation and ambient conditions, more flexible design to other processes, and good compatibility [3], [4]. Furthermore, more improved and intricate control algorithms such as a flexible control with sudden transition in various loads and an interface with sensors can be achieved using digital technologies [4].…”

“…These digitalized systems have several merits of good noise immunity, insensitivity to process variation and ambient conditions, more flexible design to other processes, and good compatibility [3], [4]. Furthermore, more improved and intricate control algorithms such as a flexible control with sudden transition in various loads and an interface with sensors can be achieved using digital technologies [4]. For the most part, however, an analog-to-digital converter (ADC) has been necessary to realize a digitalized DC-DC converter, and hence, the system has a quite large amount analog block [3], [4].…”

“…Furthermore, more improved and intricate control algorithms such as a flexible control with sudden transition in various loads and an interface with sensors can be achieved using digital technologies [4]. For the most part, however, an analog-to-digital converter (ADC) has been necessary to realize a digitalized DC-DC converter, and hence, the system has a quite large amount analog block [3], [4]. To get the essential merits of digitalized DC-DC converters, those systems should be implemented without ADCs.…”