Direct Coupled Biasing Circuit for High Frequency Applications

This invention eliminates the need for capacitor coupling or transformer coupling, and the associated undesirable parasitic capacitance and inductance associated with these coupling techniques when designing high frequency (˜60 GHz) circuits. At this frequency, the distance between two adjacent stag...

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Bibliographic Details
Main Authors THAM KHONGMENG, SOE ZAW
Format Patent
LanguageEnglish
Published 20.12.2012
Subjects
CONTROLLING
PHYSICS
REGULATING
SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
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Summary:This invention eliminates the need for capacitor coupling or transformer coupling, and the associated undesirable parasitic capacitance and inductance associated with these coupling techniques when designing high frequency (˜60 GHz) circuits. At this frequency, the distance between two adjacent stages needs to be minimized. A resonant circuit in series with the power or ground leads is used to isolate a biasing signal from a high frequency signal. The introduction of this resonant circuit allows a first stage to be directly coupled to a next stage using a metallic trace. The direct coupling technique passes both the high frequency signal and the biasing voltage to the next stage. The direct coupling approach overcomes the large die area usage when compared to either the AC coupling or transformer coupling approach since neither capacitors nor transformers are required to transfer the high frequency signals between stages.
Bibliography:Application Number: US201113163562