In a double-tuning circuit including a primary tuning circuit having a first inductor and a first variable capacitive element connected in parallel and a secondary tuning circuit having a second inductor and a second variable capacitive element connected in parallel, a fixed part of a copper-foil pattern...http://www.google.fr/patents/US7852177?utm_source=gb-gplus-shareBrevet US7852177 - Double-tuning circuit of television tuner
