CHOOCHUAN, C. .; PIRAJNANCHAI, V. Function Generator and Delta Modulator Circuits Using Current Tunable Technique. Journal of Engineering, RMUTT, [S. l.], v. 1, p. 75–79, 2002. Disponível em: https://ph01.tci-thaijo.org/index.php/jermutt/article/view/242390. Acesso em: 19 may. 2024.