Translating filter

Details Translating filter Translating filter

1977-02-09

1978-04-25

Heyman, John S.

328 14, 328160, 328166, 328133, H03B 104, H04B 1500

Patent

active

040865401

ABSTRACT:
An a.c. coupled, low-pass translating filter in which quadrature phases of n input signal spectrum are, in three successive balanced modulator stages driven by quadrature phases of externally generated carrier signals, alternately modulated-up and demodulated-down, and the sum of the remaining spectra is, in a final stage, demodulated below the cutoff frequency. Each stage terminates with a low-pass filter in which odd harmonics of the carrier frequencies and double frequencies generated in the second and final stages are eliminated.

REFERENCES:
patent: 3384824 (1968-05-01), Grenier
patent: 3464016 (1969-08-01), Kerwin et al.
patent: 3619789 (1971-11-01), Jager et al.
patent: 3961172 (1976-06-01), Hutcheon

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