Patent ID: 6930565
Filing Date: 2005-08-16
Classification: H03J

Abstract:
1. A tuning system for continuous-time filters comprising: an active real band-pass filter for receiving an input signal and for generating an output signal in a signal path; a first tuning system connected to said active real band-pass filter for receiving an output signal from said active real band-pass filter and for generating a reference signal applied to said active real band-pass filter for tuning said active real band-pass filter while said active real band-pass filter is simultaneously operating on said input signal; said first tuning system includes a first frequency-tuning system and a first Q-tuning system; an active complex band-pass filter connected in said signal path for receiving an input signal on said signal path and for generating an output signal; a second tuning system connected to said active complex band-pass filter for receiving an output signal from said active complex band-pass filter and for generating a reference signal applied to said active complex band-pass filter for tuning said active complex band-pass filter while said active complex band-pass filter is simultaneously operating on said input signal on said signal path; and said second tuning system includes a second frequency-tuning system and a second Q-tuning system.