Stabilization network and a semiconductor device having the stabilization network
AssigneeKabushiki Kaisha Toshiba
InventorsChoon Yong Ng, Kazutaka Takagi, Naotaka Tomita
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Abstract
A stabilization network and a semiconductor device having the stabilization network wherein the stabilization network includes an active element having a negative resistance accompanying a high frequency negative resistance oscillation; and a tank circuit composed of a resistance connected to a main electrode of the active element, an inductance and capacitance which are connected in parallel with the resistance and synchronize with an oscillating frequency of the high frequency negative resistance oscillation, wherein the stabilization network is performed for suppressing a negative resistance accompanying a Gunn oscillation and obtaining stable and highly efficient power amplification.
Claims16
A stabilization network comprising:
- a resistance connected between an output terminal and a drain terminal electrode of an active element which generates a negative resistance at an oscillation frequency of a high frequency negative resistance oscillation of Gunn oscillation and a value of the resistance is equal to an absolute value of the negative resistance;
- and
- a tank circuit which is composed of an inductance and a capacitance which are connected in parallel with the resistance and synchronize with the oscillating frequency of the high frequency negative resistance oscillation,
- wherein the capacitance is placed on an upper part or a lower part of the resistance, and the capacitance has an inter-digital capacitance structure composed of a first metal layer and a second metal layer placed adjacent to the first metal layer,
- wherein the oscillation frequency is tuned with a resonance frequency of the tank circuit, so that the negative resistance of the active element is canceled by using the value of the resistance at the oscillation frequency, a source inductance is connected between a source of the active element being only a single active element and grounding electric potential.
A semiconductor device having a stabilization network wherein
- the stabilization network comprises:
- an active element which generates a negative resistance at an oscillation frequency of a high frequency negative resistance oscillation of Gunn oscillation;
- and
- a tank circuit composed of a resistance connected between an output terminal and a drain terminal electrode of the active element, an inductance and a capacitance which are connected in parallel with the resistance and synchronize with the oscillating frequency of the high frequency negative resistance oscillation and a value of the resistance is equal to an absolute value of the negative resistance,
- a source inductance is connected between a source of the active element being only a single active element and grounding electric potential,
- wherein the capacitance is placed on an upper part or a lower part of the resistance, and the capacitance has an inter-digital capacitance structure composed of a first metal layer and a second metal layer placed adjacent to the first metal layer, and
- wherein the oscillation frequency is tuned with a resonance frequency of the tank circuit, so that the stabilization network cancels the negative resistance by using the value of the resistance at the oscillation frequency.
Dependencies are inferred from the claim text.