An impedance-matching network for impedance-matching a generator to a load over a wide range of frequencies and impedances. The network includes a first pair of busses across which a plurality of capacitors may be selectively connected to achieve an overall desired value of capacitance for the network,...http://www.google.com.au/patents/US4095198?utm_source=gb-gplus-sharePatent US4095198 - Impedance-matching network
