Superheterodyne in a sentence

Advantages and disadvantages Superheterodyne receivers have essentially replaced all previous receiver designs.

A major application of the heterodyne process is in the superheterodyne radio receiver circuit, which is used in virtually all modern radio receivers.

A publicity photograph was made of him presenting Marion with the world's first portable superheterodyne radio as a wedding gift.

At the cost of an extra frequency converter stage, the superheterodyne receiver provides superior selectivity and sensitivity compared with simpler designs.

By the mid-1930s, commercial production of TRF receivers was largely replaced by superheterodyne receivers.

Consequently, there can be mutual interference in the operation of two or more superheterodyne receivers in close proximity.

From this time, the superheterodyne design was used for virtually all commercial radio and TV receivers.

He had been awarded French patents in 1917 and 1918 that covered some of the same basic ideas used in Armstrong's superheterodyne receiver.

Image frequencies can be eliminated by sufficient attenuation on the incoming signal by the RF amplifier filter of the superheterodyne receiver.

Image frequency (f img ) One major disadvantage to the superheterodyne receiver is the problem of image frequency.

In 1919, Armstrong filed an application for a U.S. patent of the superheterodyne circuit, which was issued the next year.

In addition to the magnetron (right), it contains a TR (transmit/receive) switch tube and the superheterodyne receiver front end, a 2K25 reflex klystron tube local oscillator and a 1N21 germanium diode mixer.

Modern designs Microprocessor technology allows replacing the superheterodyne receiver design by a software defined radio architecture, where the IF processing after the initial IF filter is implemented in software.

Most other signals produced by the mixer (such as due to stations at nearby frequencies) can be filtered out in the IF amplifier; that gives the superheterodyne receiver its superior performance.

Radio transmitters may also use a mixer stage to produce an output frequency, working more or less as the reverse of a superheterodyne receiver.

Signal reception is invariably done via a superheterodyne receiver : the first stage is a tuner which selects a television channel and frequency-shifts it to a fixed intermediate frequency (IF).

Spreading of the spectrum line caused by phase noise must be minimised in the local oscillator for a superheterodyne receiver because it defeats the aim of restricting the receiver frequency range by filters in the IF (intermediate frequency) amplifier.

The complicated amplifier and bandpass filter stages, which in previous receivers had to be made tunable to work at the different station frequencies, in the superheterodyne can be built to work at one fixed frequency, the IF, simplifying their design.

The frequency mixer does the actual heterodyning that gives the superheterodyne its name; it changes the incoming radio frequency signal to a higher or lower, fixed, intermediate frequency (IF).

The intent was to develop an alternative receiver circuit that required fewer tuned circuits than the superheterodyne receiver.