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Roger Charbonnier, Joel Remy, Gerard Sauvage: Microwave transmission line element comprising one or more incorporated switching members for inserting one or more quadripoles. Adret Electronique, William A Drucker, June 17, 1986: US04595893 (9 worldwide citation)

A microwave coaxial switch has a central conductor which comprises two fixed segments connected by a movable segment, controlled by a switch member. The resilient ends of the fixed segments come into engagement with the contacts of a quadripole such as an attenuator cell, when they are freed from th ...


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Joel Remy, Roger Charbonnier: Frequency synthesizer stage adding high frequency steps to an initial frequency. Adret Electronique, William A Drucker, July 21, 1987: US04682122 (7 worldwide citation)

A frequency synthesizer for adding large frequency steps to an initial frequency. A first phase lock loop divides the input frequency Fo+.DELTA.(.DELTA. being the sum of smaller frequency steps) by a rational division factor and adds to the result a standard frequency P in a fixed integral ratio wit ...


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Roger Charbonnier: Doubly balanced diode mixer comprising a ring modulator each leg of which comprises a high speed conventional diode in series with at least one diode of the "varactor" kind. Adret Electronique, William A Drucker, January 13, 1987: US04637069 (6 worldwide citation)

A doubly balanced mixer comprising a ring modulator each leg of which is formed by the series connection of a high speed switching diode and one or more diodes with low intrinsic resistance and with high accumulated charges, preferably of the "varactor" or "PIN" type.


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Roger Charbonnier: Low noise crystal oscillator. Adret Electronique, William A Drucker, August 20, 1985: US04536721 (5 worldwide citation)

A crystal oscillator comprises an active coupling member driving the series mode resonance of a piezoelectric crystal proportionally to a feedback voltage. Said coupling member is followed by a current boosting transformer whose secondary winding is connected to an output amplifier and to a clipping ...


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Roger Charbonnier: Oscillator, in particular a surface acoustic wave oscillator, frequency controlled by controlling its temperature. Schlumberger, William A Drucker, August 29, 1989: US04862110 (5 worldwide citation)

An oscillator is provided, in particular a surface acoustic wave oscillator, frequency controlled by controlling its temperature, which oscillator comprises a SAW resonator frequency controlled by an integral loop including a heating means coupled thermally to the resonator and by two electric respe ...


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Roger Charbonnier, Joel Remy: Quaternary frequency synthesizer. Adret Electronique, William A Drucker, January 13, 1987: US04636733 (1 worldwide citation)

A decimal frequency synthesizer in which, for each decade, two identical sets of four arithmetic progression frequencies are generated by programmed frequency divisions effected in parallel from a standard frequency and applied to two mixers. The first mixer further receives the frequency from the p ...


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Roger Charbonnier: Binary frequency divider for microwaves. Ardet Electrique, William Anthony Drucker, March 1, 1977: US04010384

A binary frequency divider comprises a plurality of serially connected trigger circuits each comprising a switching means having first, second and third terminals and control means for connecting the first terminal alternately to the second terminal and to the third terminal; first storage means con ...


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