The wideband tunable bandpass filter and multi-band wideband tunable bandpass filter using it

摘要

About to start a broadband tunable bandpass filter using the same wideband and multi-band tunable band-pass filter. Wideband tunable bandpass filter according to the present invention may vary the center frequency and bandwidth of the signal is filtered digitally, a plurality of switched capacitor banks to vary the capacitance by changing the center frequency and bandwidth to a digital signal (SCB ), and having a number of inductors to provide a predetermined inductance for calculating the center frequency, the plurality of switched-capacitor bank (SCB) is preferably integrated on a single chip. Since passive devices used in conjunction with a transistor switch according to the present invention, the digital control is possible, and a small size, and low power consumption, there is an effect that the manufacturing cost to implement the band-pass filter of the low bandwidth.