Coordinated antenna circuits and circuits in receivers: has the task to coordinate resistance with an antenna, signal need resonance filter, high frequency noise, photo. The high frequency amplifier block currency has the task of signal amplification, enhanced filtering for high frequency noise, image interference. Buffer amplifier block: prevent photo damage of frequency mixing block ởng ¬ currency to fluctuate constantly. trading frequency: frequency mixing mixing of two signals and signal to fNS fCT Central frequency (fTT currency). High frequency filter 11.5 MHz are resonant circuits with high-quality, select the Middle frequency signals, filters out surrounding noise. Block high frequency amplifier: high frequency signal amplification, filtering, noise-enhanced decision sensitivity receivers. The term marginal blocks of Central frequency: high frequency signal is marginal term, whisked amplitude noise. The circuit split frequency waves: wave signal separation frequency high frequency sound signals put out and 150 Hz. Audio frequency amplifier block (KĐAT): audio frequency signal amplifier taken to block the audio frequency power amplifier (KĐCSAT) and the im noise. KĐCSAT block: audio frequency signal amplifier power given enough headphones. Khối im ồn gồm bốn tầng: Tầng khuếch đại đầu vào im ồn, tầng chọn lọc tín hiệu 150 Hz, tầng tách sóng, tầng khuếch đại một chiều có tải là rơ le K3.- Khối dao động liên tục tạo ra tín hiệu ngoại sai khi thu, dao động chủ sóng khi phát, nhưng tần số ngoại sai lớn hơn tần số chủ sóng 50 KHz (fVFO = (41,50 64,45) MHz).
đang được dịch, vui lòng đợi..