Thomson Hybrides Et Microondes

Thomson Hydbrides Et Microondes

Maurice Gloanec

Jacques Jarry

Jean L Lailler

A circuit for measuring the dynamic characteristics of encapsulating packages for high-speed integrated circuits includes at least two amplifiers integrated on a semiconductor substrate. These amplifiers have the same input and output impedances as those of the high-speed circuit to be encapsulated within the package. The amplifiers are located in widely spaced relation in order to ensure that there is no internal coupling. Depending on the measurements to be performed, the two amplifiers are mounted in parallel or in antiparallel relation. In order to measure the dynamic characteristics of a package, a measuring circuit is mounted within a package and a signal (V.sub.e) is addressed to an input connection of the package. The transmission and coupling coefficients are deduced from measurement of the signal (V.sub.S) collected on an output connection.

Circuit for measuring the dynamic characteristics of a package for

A Gunn effect triode working as a programmable frequency dynamic divider or as a VCO oscillator is disclosed. The Gunn effect triode is made up of a layer of III-V material and has three metallizations, namely the anode metallization, the cathode metallization and the gate metallization. According to the invention, firstly, the layer has a non-uniform width between the anode and gate metallization which is either trapezoidal or bounded by two hyperbolas. Then, on the gate metallization DC bias voltage, V.sub.GK, or the anode metallization DC bias voltage, V.sub.AK, there is superimposed an alternating control voltage, V.sub.HF, which is a harmonic of the free oscillating frequency of the triode. The order of division is equal to the harmonic order. The output frequency is adjusted by vernier operation on the harmonic frequency.

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Bures sur Yvette, France

Maurice Gloanec