US 9,871,487 B2Granted

Harmonic rejection translational filter

AssigneeMediatek Inc.

InventorsYing-Tsang Lu, Chih-Ming Hung, Meng-Chang Lee

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Abstract

A harmonic translational filter includes a first path, a second path and a signal combiner. The first path has a first translational filter that is driven by a plurality of first oscillation signals, and is arranged to generate a first output signal according to an input signal. The second path has a second translation filter that is driven by a plurality of second oscillation signals that are different from the first oscillation signals in phase. The second path is coupled to the first path and arranged to generate a second output signal according to the input signal. The signal combiner is coupled to the first path and the second path, and arranged to combine the first output signal and the second output signal to generate a filtered signal.

Claims14

Dependent claims

A harmonic-rejection translational filter, comprising:

a first path, having a first translational filter, driven by a plurality of first oscillation signals, arranged to generate a first output signal according to an input signal;
a second path, coupled to the first path, each having a second translational filter that is driven by a plurality of second oscillation signals with phases that are different from phases of the first oscillation signals, arranged to generate a second output signal according to the input signal;
and
a signal combiner, coupled to the first path and the second path, arranged to combine the first output signal and the second output signal to generate a filtered signal, wherein harmonic responses caused by the first oscillation signals and the second oscillation signals are substantially reduced from the filtered signal by combining the first output signal and the second output signal.

1 more element

Dependencies are inferred from the claim text.

Facts

Application: 15/125,148Filed 13 Mar 2015 · us provisional application
Priority: 13 Mar 2014
Published: US 2016/0380593 A129 Dec 2016
Granted: 16 Jan 2018
Term ends: Not estimatedThe source records don’t support an estimate.

Classification10 codes

H03D 7/1483
With transistors: comprising components for selecting a particular frequency component of the output
H03D 7/1441
With transistors: using field-effect transistors
H03D 7/1458
With transistors: double balanced arrangements, i.e. where both input signals are differential
H03D 7/1466
With transistors: passive mixer arrangements