US 2013/0293303 A1Published application

Dual Carrier Amplifier Circuits And Methods

AssigneeMarvell World Trade Ltd.

InventorsGregory UEHARA, Xiaohua Fan

Life of this patent

Estimating the term…

Loading patent…

Abstract

A circuit includes first and second transconductance stages that generate first and second currents, respectively, in response to an input signal. A current combiner circuit selectively couples the first current to a first output, selectively couples the second current to the first output, selectively couples the first current to a second output, and selectively couples the second current to the second output. In response to the first current being coupled to both the first and second outputs, the current combiner circuit couples the second current to both the first and second outputs. In response to the first current being decoupled from the second output, the current combiner circuit decouples the second current from both the first and second outputs. In response to the first current being decoupled from the first output, the current combiner circuit decouples the second current from both the first and second outputs.

Claims20

Dependent claims

A circuit comprising:

a first transconductance stage configured to generate a first current in response to an input signal;
a second transconductance stage configured to generate a second current in response to the input signal;
and
a current combiner circuit configured to (i) selectively couple the first current to a first output, (ii) selectively couple the second current to the first output, (iii) selectively couple the first current to a second output, and (iv) selectively couple the second current to the second output,
wherein the current combiner circuit is configured to
(i) in response to the first current being coupled to both the first output and the second output, couple the second current to both the first output and the second output,
(ii) in response to the first current being decoupled from the second output, decouple the second current from both the first output and the second output, and
(iii) in response to the first current being decoupled from the first output, decouple the second current from both the first output and the second output.

5 more elements

Dependencies are inferred from the claim text.

Facts

Application: 13/936,400Filed 8 Jul 2013
Priority: 2 Mar 2010
Published: 7 Nov 2013
Term ends: Not estimatedThe source records don’t support an estimate.

Classification17 codes

H03H 11/0461
Using transconductance amplifiers, e.g. gmC filters: current mode filters
H03F 1/223
By use of cascode coupling, i.e. earthed cathode or emitter stage followed by earthed grid or base stage respectively: with mosfet's
H03F 3/45076
With semiconductor devices only: characterised by the way of implementation of the active amplifying circuit in the differential amplifier
H03F 3/72
Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements: gated amplifiers, i.e. amplifiers which are rendered…

Family

Application61/309,810Us provisional application · filed 2 Mar 2010
Application13/038,778Continuation · filed 2 Mar 2011
Application13/936,400Continuation
US 2011/0217945 A1Published application
US 8,483,645 B2Related patent
US 9,042,859 B2Related patent
US 2013/0293303 A1This patent

From the US filing history. Foreign family members aren’t listed.