Multi-band tuner with fixed broadband input filters

Details Multi-band tuner with fixed broadband input filters Multi-band tuner with fixed broadband input filters

1978-01-31

1979-01-02

Richardson, Robert L.

325437, 325489, H04B 110

Patent

active

041329520

ABSTRACT:
A tuner for receiving signals broadcast on two spaced bands, each divided into several channels, has two fixed bandpass filters, one to pass all of the channels in the lower frequency band and the other to pass all of the channels in the higher frequency band. The tuner includes a mixer to which signals of either band are supplied by selective operation of a double-throw switch. A tunable local oscillator supplies a heterodyning signal to the mixer to convert any selected channel of the received signal to an intermediate frequency (i.f.) band chosen to avoid image interference from undesired channels, whether the local oscillator frequency is above or below the selected channel. To ease the constraints on the choice of the i.f. band, different i.f. filters tuned to first and second i.f. bands may be used for the higher and lower received bands. A second double-throw switch ganged with the first switch can then be used to direct the heterodyned signals to the proper i.f. filter.

REFERENCES:
patent: 3333198 (1967-07-01), Mandell et al.
patent: 3414821 (1968-12-01), Bickers et al.
patent: 3639840 (1972-02-01), Shekel et al.
patent: 3942120 (1976-03-01), Ham

Affiliated with

Also associated with

Rating

Multi-band tuner with fixed broadband input filters does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Multi-band tuner with fixed broadband input filters, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Multi-band tuner with fixed broadband input filters will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1519636