To the left is the signal input which then goes through an RLC network to the base of the class-C transistor which then amplifies the signal to power the base of the class-E transistor (it needs amplification because the BJT requires current and a MOSFET can’t be used because it’s high capacitance will not work with the high frequencies). Above the class-C is another RLC network to smooth the power consumption (from much push pull to some constant pull). You may notice a missing 5pF capacitor in the class-E network, but that is substituted by the parasitic capacitance of the transistor.
