A tuning circuit for an RF communications system and method includes a master block that outputs a control signal to a slave block. The master block can include a first filter having a high pass filter and a low pass filter that each receive the control signal, a first rectifier coupled to the high pass...http://www.google.fr/patents/US6404277?utm_source=gb-gplus-shareBrevet US6404277 - Gm-C tuning circuit with filter configuration
