Attenuator having phase between input and output signals indepen

Details Attenuator having phase between input and output signals indepen Attenuator having phase between input and output signals indepen

1993-12-08

1994-11-08

Gensler, Paul

Wave transmission lines and networks

Plural channel systems

Having branched circuits

333130, 333 81R, 323353, 323354, H03H 724, H03H 748

Patent

active

053630700

ABSTRACT:
An attenuator includes first resistors that are connected in series to each other at connection nodes and between an input node and a fixed voltage node, voltage output nodes coupled to the input node and the respective connection nodes of the first resistors, switches and corresponding second resistors being respectively connected in series between the connection nodes and voltage output nodes and commonly connected to an output node, and a load capacitance connected between an output node and the fixed voltage node. The phase between input and output signals is independent of the attenuation. A phase difference is added by the second resistor so that the phase shift determined by the voltage dividing ratio of the first resistors selected by closing a switch and by the value of the load capacitance is compensated.

REFERENCES:
patent: 3453529 (1969-07-01), Richman
patent: 4912394 (1990-03-01), Sugimoto et al.

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