Modular attenuator

Details Modular attenuator Modular attenuator

1996-08-01

1997-06-24

Matar, Ahmad F.

Telephonic communications

Line equalization or impedance matching

379395, 379394, H04M 704

Patent

active

056424159

ABSTRACT:
A modular signal attenuator is provided by resistors (R1, R2 and R3, R4) connected in respective series for connection in each branch of tip and ring telephone circuitry. A pair of capacitors (C1, C2) connected to equate to a non-polar capacitor and a resistor (R5) connected in series are shunted across the serially-connected resistors (R1, R2 and R3, R4) between adjacent resistors (R1 and R2, R3 and R4) of each series of resistors in the tip and ring branches.

REFERENCES:
patent: 652230 (1900-06-01), Pupin
patent: 2645681 (1953-07-01), Green
patent: 4123626 (1978-10-01), Munter
patent: 4220834 (1980-09-01), Holce et al.
patent: 4600816 (1986-07-01), McDermott
patent: 4961219 (1990-10-01), Patel

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