Telecommunications – Receiver or analog modulated signal frequency converter – Frequency modifying or conversion
Patent
1980-01-18
1982-02-23
Bookbinder, Marc E.
Telecommunications
Receiver or analog modulated signal frequency converter
Frequency modifying or conversion
307424, 330 49, 455331, H04B 126, H03F 704
Patent
active
043172318
ABSTRACT:
In a microwave circuit for a parametric upper sideband down converter with real image frequency termination conductance, including a pump circuit supplying a pump signal, a parallel circuit at its input, an intermediate frequency circuit at its output, and a reactance diode coupling the parallel circuit and intermediate frequency circuit together, the parallel circuit is tuned approximately to the frequency of the pump signal; the intermediate frequency circuit is composed of a .pi. filter having a series branch containing a first inductance connected in series between the diode and the output of the microwave circuit, a first shunt branch located between the diode and the inductance and containing a first capacitance and a second shunt branch located between the inductance and the output of the microwave circuit and containing a second capacitance; the microwave circuit further includes a second inductance connected in series with the reactance diode; and the portion of the microwave circuit constituted by the diode, the second inductance and the first capacitance forms a resonant circuit tuned to the frequency of the pump signal.
REFERENCES:
patent: 3070751 (1962-12-01), Vigiano
patent: 3991373 (1976-11-01), Maurer et al.
patent: 4138648 (1979-02-01), Hudspeth et al.
patent: 4158817 (1979-06-01), Locherer
Maurer Robert
Schau Walter
Bookbinder Marc E.
LICENTIA Patent-Verwaltungs-G.m.b.H.
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