| 摘要 |
FIELD: physics; radio. ^ SUBSTANCE: superheterodyne receiver relates to radio engineering and can be used in radio systems for different purposes. The superheterodyne receiver comprises a reception antenna, an input circuit, a radio frequency amplifier, a mixer, a heterodyne, two low-pass filters, two high-pass filters, two signal-to-noise ratio measuring devices, an electronic switch, an intermediate frequency amplifier, a detector, a modulation frequency amplifier, a terminal device and an AGC circuit. ^ EFFECT: increased sensitivity and noise immunity of the reception through reception of useful information contained in one sideband and reduction of bandwidth of the receiver. ^ 3 dwg |
