For generation of non-Foster circuit elements with negative capacitance or negative inductance, this paper newly proposes a negative impedance converter (NIC) with an emitter follower circuit. The principle of the proposed circuit topology is introduced, and then, the negative capacitance with −100 pF is demonstrated by using bipolar transistors 2SC1815GR with hFE of 283. The results indicate that (1) the voltage gain of the amplifier, Aν, used in the NIC circuit should be 2 precisely, and (2) the emitter follower enhances the bandwidth of the non-Foster response. As an application, this paper shows that a negative group delay with the delay time from −1 ns to −2 ns and negligible insertion loss is generated in a wide frequency range.