As CMOS technology scaling advances, traditional analog circuits have moved toward digital -intensive or all -digital designs during the past few years. While taking advantage of digital circuits in scaled complementary metal -oxide -semiconductor (CMOS) technology, digital -intensive or all -digital designs still cannot be absorbed in advanced design automation used by digital very -large-scale integration circuits. This chapter investigates a design methodology for analog circuits that is referred to as synthesizable analog design. In this design methodology, all circuit building blocks are implemented in all -digital architecture and expressed in a hardware description language (HDL), which can then be synthesized from commercial standard -cell libraries and automatically perform place and route (P&R) using electronic design automation tools.