Novel transistorised lock-in f.m. discriminator

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Novel transistorised lock-in f.m. discriminator

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© The Institution of Electrical Engineers
Published

A novel single-stage transistorised f.m. discriminator is described. It utilises the principle of a lock-in oscillator, and proves to be superior to the ratio detector as far as selectivity, sensitivity, distortions and a.m. rejection are concerned. Also, fewer and simpler components are required.

Inspec keywords: discriminators

Subjects: Modulators, demodulators, discriminators and mixers

References

    1. 1)
      • W.E. Bradley . Single-stage f.m. detector. Electronics , 88 - 91
    2. 2)
      • J.R. Woodyard . Application of the autosynchronized oscillator to frequency demodulation. Proc. Inst. Radio Engrs. , 612 - 619
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      • Eccles, W.H., Vincent, J.H.: `Improvements in wireless communication', 163 462, 1920, British Patent.
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      • S.W. Seeley , J. Avins . The ratio detector. RCA Rev. , 201 - 236
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      • G. Mahler . Der Mitnahmeoszillator als Trägerregenerator im PAL-Farbfernsehempfänger. Telefunkenzeitung , 136 - 139
    6. 6)
      • K.A. Edwards , O. Golubjatnikov , D.J. Brady . Transistor phase-locked oscillators. Trans. Amer. Inst. Elect. Engrs. , 1043 - 1051
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