Attenuator circuit apparatus

Details Attenuator circuit apparatus Attenuator circuit apparatus

1994-09-14

1995-09-05

Gensler, Paul

Wave transmission lines and networks

Attenuators

327308, 333 81A, H01P 122, H03H 724

Patent

active

054482070

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.

REFERENCES:
patent: 3014187 (1961-12-01), Sher et al.
patent: 4837530 (1989-06-01), Kondoh
patent: 5049841 (1991-09-01), Cooper et al.
F. McGrath et al., "An Ultra Broadband DC-12 GHz 4-Bit GaAs Monolithic Digital Attenuator", 13th Annual GAAS IC Symposium, Technical Digest 1991, Oct. 1991, pp. 247-250.
European Search Report dated Dec. 30, 1994, Examiner: E. Deconinck, Re: EP 94 40 2106.

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