Frequency-conversion mixer
AssigneeKokan Densetsu Kogyo Kabushiki Kaisha
InventorEiji Suzuki
Life of this patent
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Abstract
A frequency-conversion mixer, which is designed to operate in substantially the whole range of the radio frequency band extending from low frequency to the ultra-high frequency, has first and second diodes inversely arranged in parallel connection between a first input terminal for a receiving signal and a junction point. Third and fourth diodes are connected in forward series between a common terminal and a second input terminal for an oscillator signal with the junction point between the third and fourth diodes. A dc component removing capacitor is connected to the junction point for providing a frequency mixed signal, whereby the use of a transformer as used in a double balanced mixer is eliminated and there is practically no output response at frequencies below the cutoff frequency of the diodes.
Claims15
A frequency-conversion mixer comprising:
- input means having a parallel circuit including a first and second diode arranged in inverse parallel connection with each other for inputting input signals from its one terminal;
- detecting means having a series circuit including a third and fourth diode arranged in forward series connection, the other terminal of said parallel circuit being connected to the junction point of said third and fourth diode and local oscillating signals being supplied to one of said series circuit;
- and
- a capacitor of which one terminal is connected to said junction point, the frequency-converted signals being taken out from the other terminal.
A frequency-conversion mixer, comprising:
- input means for providing a receiving signal of a first frequency, the input means having a first input terminal for receiving the receiving signal, a junction point, and first and second oppositely oriented diodes connected in parallel between the first input terminal and the junction point;
- detecting means for providing a local-oscillator signal, the detecting means having a second input terminal for receiving the local-oscillator signal, a common terminal, and third and fourth diodes connected in forward series from the common terminal to the second input terminal with the junction point connected between the third and fourth diodes;
- and
- capacitive means for outputting a frequency-mixed signal from the junction point.
Dependencies are inferred from the claim text.