| 摘要 |
A MULTIPLE-MODE RECEIVER INCORPORATING DIRECT CONVERSION (PROCESSING RECEIVED SIGNALS USING INTERMEDIATE FREQUENCIES WITHIN THE SAME FREQUENCY RANGE AS THE RECEIVED SIGNAL BANDWIDTH) RATHER THAN SUPERHETERODYNE CIRCUITRY, ALLOWING RECEIVER HARDWARE COMPONENTS TO BE RE-USED RATHER THAN REPLICATED FOR EACH BAND. VARIOUS EMBODIMENTS ARE DISCLOSED IN WHICH LOW PASS FILTERS (42A, 42B), MIXERS (40A, 4LA; 40B, 4LB) QUADRATURE GENERATORS (38A, 38B), OSCILLATORS (36A, 36B), AND AMPLIFIERS (34A, 34B) ARE RE-USED.
|
