Abstract: A temperature-sensing device of a mobile terminal is provided. The device comprises a pulse amplitude module (PAM), a mobile station modem (MSM) having ground and temperature-sensing terminals for controlling the PAM, and an electrical circuit. The circuit comprises first and second conductors, each having first and second ends. The first end of the first conductor is connected to the ground terminal, the first end of the second conductor is connected to the temperature-sensing terminal, and the second ends of the first and second conductors are connected to each other to form a junction. With the conductors oppositely charged and the junction situated adjacent to the PAM, the temperature difference between the junction and the MSM generates an electromotive force due to the Seebeck effect.