Receiver technology had been advancing gradually and regularly. Many of the functions performed by a analogue electronics can be performed by software instead. The benefit is that software is not affected by temperature, physical variables, electronic noise and manufacturing defects.
While today's radios are amazing pieces of modern technology, filled with low- power, high performance, integrated circuits crammed into the smallest spaces, the basic principle of the radio receiver is practically always the superheterodyne one, the same idea which was developed by Edwin Armstrong back in 1918.[4] For really high-performance receivers, such as satellite communications receivers and military/naval receivers, two-stage ("double conversion") and even three-stage ("triple conversion") superheterodyne processing is frequently used. Single-conversion receivers are rather simple-minded in their nature.
While today's radios are amazing pieces of modern technology, filled with low- power, high performance, integrated circuits crammed into the smallest spaces, the basic principle of the radio receiver is practically always the superheterodyne one, the same idea which was developed by Edwin Armstrong back in 1918.[4] For really high-performance receivers, such as satellite communications receivers and military/naval receivers, two-stage ("double conversion") and even three-stage ("triple conversion") superheterodyne processing is frequently used. Single-conversion receivers are rather simple-minded in their nature.
No comments:
Post a Comment