US 11,271,556 B2Granted

Modular analog signal multiplexers for differential signals

AssigneeAnalog Devices International Unlimited Company

InventorsJoseph Adut, Gregory Fung, Brian Hamilton

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Abstract

An example analog signal multiplexer includes two differential input signal ports for receiving a first and a second differential input signals, IN1 and IN2. The multiplexer further includes a differential output signal port with two output terminals OUT+ and OUT−, for outputting a signal based on one or more of the input signals IN1 and IN2. Furthermore, the multiplexer includes a pair of load elements, and an additional differential output signal port that has two output terminals TERM+ and TERM−. The load elements are not coupled directly to the output terminals OUT+ and OUT−, but, rather, are coupled to the output terminals of the additional output signal port, TERM+ and TERM−, enabling a modular approach where multiple instances of the multiplexer may be combined on an “as-needed” basis to realize multiplexing between a larger number of differential inputs that a single multiplexer would allow.

Claims26

Dependent claims

A system comprising a signal multiplexer arrangement, the signal multiplexer arrangement comprising:

a first signal multiplexer, including a load and an output stage, where an input of the output stage of the first signal multiplexer is coupled to a first input of the signal multiplexer arrangement, and where an output of the output stage of the first signal multiplexer is coupled to an output of the first signal multiplexer;
and
a second signal multiplexer, including a load and an output stage, where an input of the output stage of the second signal multiplexer is coupled to a first input of the signal multiplexer arrangement, and where an output of the output stage of the second signal multiplexer is coupled to an output of the second signal multiplexer,
wherein:
the output of the first signal multiplexer is coupled to the output of the second signal multiplexer,
the load of the first signal multiplexer is coupled to the output of the first signal multiplexer, and
the load of the second signal multiplexer is de-coupled from the output of the first signal multiplexer and from the output of the second signal multiplexer.

4 more elements

A system comprising a signal multiplexer arrangement, the signal multiplexer arrangement comprising:

a first signal multiplexer, including a load and an output stage, where an input of the output stage of the first signal multiplexer is coupled to a first input of the signal multiplexer arrangement, and where an output of the output stage of the first signal multiplexer is coupled to an output of the first signal multiplexer;
a second signal multiplexer, including a load and an output stage, where an input of the output stage of the second signal multiplexer is coupled to a first input of the signal multiplexer arrangement, where an output of the output stage of the second signal multiplexer is coupled to an output of the second signal multiplexer, and where the output of the first signal multiplexer is coupled to the output of the second signal multiplexer;
and
a switch arrangement, to couple and de-couple the load of the first signal multiplexer and the output of the first signal multiplexer.

1 more element

A signal multiplexer, comprising:

an output stage, having an input coupled to an input of the signal multiplexer, and having an output coupled to an output of the signal multiplexer;
and
a load,
wherein:
the signal multiplexer is to operate either in a first mode or in a second mode,
in the first mode, the load is coupled to the output of the signal multiplexer, and
in the second mode, the load is not coupled to the output of the signal multiplexer.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 16/923,884Filed 8 Jul 2020 · us provisional application
Priority: 19 Sep 2019
Published: US 2021/0091761 A125 Mar 2021
Granted: 8 Mar 2022
Term ends: Not estimatedThe source records don’t support an estimate.

Classification14 codes

H03K 17/005
Switching arrangements with several input- or output terminals: with several inputs only
H03K 17/6264
With several inputs only combined with selecting means: using current steering means
G01S 7/4861
Receivers: circuits for detection, sampling, integration or read-out
H03F 1/083
Modifications of amplifiers to reduce detrimental influences of internal impedances of amplifying elements: in transistor amplifiers