Attenuator circuit apparatus
AssigneeSony Corporation
InventorKazumasa Kohama
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Abstract
An attenuator circuit which has a small insertion loss and also has a broad tolerance toward the fluctuation of the element parameter. An attenuator stage having the largest attenuation quantity of a plurality of attenuator stages is formed with a .pi.-type attenuator stage, and an attenuator stage having the smallest attenuation quantity of the plurality of attenuator stages is formed with a T-type attenuator stage. In this way, an attenuator stage having a large attenuation quantity whose precision of the attenuation quantity is apt to be detracted is formed with a .pi.-type attenuator stage so that the precision becomes high, further, an attenuator stage having a small attenuation quantity is formed with a T-type attenuator stage so that the insertion loss can be lowered.
Claims4
An attenuator circuit apparatus having a plurality of series connected attenuator stages, wherein:
- an attenuator stage having the largest attenuation quantity of said plurality of attenuator stages is composed of a .pi.-type attenuator stage;
- and
- an attenuator stage having the smallest attenuation quantity of said plurality of attenuator stages is composed of a T-type attenuator stage.
Dependencies are inferred from the claim text.