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In push-pull amplifiers, one device operates in the "push" phase while the other operates in the "pull" phase, hence the term "push-pull." This configuration is commonly used in VHF radio transmitters to achieve higher power output and improved linearity. Push-pull configurations can be implemented using both MOSFETs and BJTs. For MOSFETs, push-pull configurations are commonly used, particularly in high-frequency applications like VHF radio transmitters, where they offer advantages such as high efficiency and good linearity. Similarly, push-pull configurations can also be implemented using BJTs, which have been historically used in radio frequency amplification. In both cases, push-pull configurations are utilized to achieve higher power output and improved performance in VHF radio transmitters.