Frequency synthesizer employing a current mirror circuit having a control branch which includes a transistor (T1) which is supplied by a control current source (S) operating in the switch mode. An improved decay time of the current mirror circuit is obtained by providing an additional transistor (TA)...http://www.google.com/patents/US5363065?utm_source=gb-gplus-sharePatent US5363065 - Frequency synthesizer utilizing a fast switching current mirror circuit and apparatus comprising such a synthesizer
