Abstract
In an integrated circuit, transistors are used in standard configurations which occur repeatedly. In order to facilitate circuit analysis and synthesis for students, the concept of `transistor role' has been introduced and a fundamental set of bipolar and MOS transistor roles was defined. This paper presents the LTspice implementation of the Bipolar and MOS Transistor Roles Building Block (BB) Library, with the most common transistor roles. Utilizing this BB Library, we then demonstrate the LTspice implementation of three representative analog integrated circuits: the LM741 Op Amp, the Open Loop CMOS Comparator MC14575 and a composite cascode high gain CMOS Op Amp. Simulation results prove that the transistor roles BB library works as expected, while facilitating circuit analysis, thus, allowing students to synthesize and simulate complex analog circuits more easily.