1. VBPF? Variable Band Pass Filter?

2. Then the low noise amplifier amplifies the signal. Band pass filter and correlated demodulator and other circuits were also used to improve the signal noise ratio and reach wanted amplitude.

3. This paper introduces the basic principles of the band pass filter, laying emphasis on the designing of four-step band pass filter, and gives the details of design method and debug process.

4. The active inductance band pass filter is the key device for the electronic harmonic current relay.

5. A band pass filter and a trap filter made up of the filer circuit which filtrate the noise and interference effectively. The signal is enlarged by the amplifiers in the middle and the end class.

6. In this paper, the band pass filter technology for the design of a preliminary study and try to actual design.

7. Test result indicated: Using the wavelet band pass filter nature, simplified the examination system hardware electric circuit , and reduced the signal loss.

8. Band pass filter property of human visual system is used to improve correct detection rate.

9. This issue designs band pass filter and low pass filter.

10. Band pass filter is adopted to remove the high -frequency switching disturbance in node voltage measurements and avoid the time delay of common low pass filter.

11. The results show that a series of band pass filter applied in WDM and DWDM were made by the change of inserted phase-number and apodising functions.

12. An active LC band pass filter 10 includes a single LC pair and a plurality of active amplifiers providing a number of separate resonance circuits.

13. Also disclosed is a method for processing an electronic signal using the active LC band pass filter 10.

14. Studies the resonator frequency temperature characteristic( ), then designs the middle-frequency tracking band pass filter.

15. This paper lays emphasis on the designing of four-step band pass filter, and gives the details of design method and debug process.

16. Furthermore, the theory of active microwave filter is well introduced and the research of band pass filter circuit be carried here.

17. According to the theory of LTCC filters, a reactance coupling multi-layered LTCC band pass filter is designed and manufactured in the paper.

18. This paper deals on the method of ZOOM FFT based on analytic signal and band pass filter, which is different from other methods of ZOOM FFT.

19. Past research on interference filters is reviewed, it is shown that for narrow and wide band pass filter it must adopt multi cavity filter.

20. This paper laid emphasis on the designing of four-step band pass filter, and gives the details of design method and debug process.

21. In this paper, the change pattern of the cutting vibration signal during the transient processes and the effect of the parameters of band pass filter on the signal transmission are analyzed.

22. The noise of the signal is effectively restrained because that the center frequency of the band pass filter is adjusted by the processor.