Intermediate frequency

The IF stage from a Motorola 19K1 television set circa 1949.

In communications and electronic engineering, an intermediate frequency (IF) is a frequency to which a carrier wave is shifted as an intermediate step in transmission or reception. The intermediate frequency is created by mixing the carrier signal with a local oscillator signal in a process called heterodyning, resulting in a signal at the difference or beat frequency. Intermediate frequencies are used in superheterodyne radio receivers, in which an incoming signal is shifted to an IF for amplification before final detection is done.

单词	Intermediate frequency
释义	Intermediate frequency 英语百科 Intermediate frequency In communications and electronic engineering, an intermediate frequency (IF) is a frequency to which a carrier wave is shifted as an intermediate step in transmission or reception. The intermediate frequency is created by mixing the carrier signal with a local oscillator signal in a process called heterodyning, resulting in a signal at the difference or beat frequency. Intermediate frequencies are used in superheterodyne radio receivers, in which an incoming signal is shifted to an IF for amplification before final detection is done.
随便看	sharp yield point的意思 sharp zone的意思 Sharq的意思 Sharqi的意思 sharqiya的意思 Sharqpur的意思 Sharqī, Al Jabal ash的意思 Sharr的意思 sharra的意思 sharrag的意思 Sharrard的意思 Sharrard operation的意思 Sharratt的意思 sharrer的意思 Sharri的意思 Sharrie的意思 sharrieff的意思 s Harrison sulci的意思 Sharro的意思 Sharrock的意思 sharrocks的意思 sharrod的意思 Sharron的意思 sharrons的意思 Sharrow的意思