Mixers with a plurality of local oscillators and systems...

Details Mixers with a plurality of local oscillators and systems... Mixers with a plurality of local oscillators and systems...

2007-09-18

2007-09-18

Moe, Aung (Department: 2618)

Telecommunications

Receiver or analog modulated signal frequency converter

Frequency or phase modulation

C455S313000, C455S293000

Reexamination Certificate

active

10523667

ABSTRACT:
A receiver apparatus including a main input for receiving the input signal and a first standard mixer having a first mixer input, a first local oscillator input, and a first mixer output. The first mixer input is connected to the main input and the first local oscillator input is connected to a source that provides a first local oscillator signal having a frequency close to or equal to the carrier frequency. The apparatus further including a second mixer with a second mixer input, a second local oscillator input, and a second mixer output. The second mixer input is connected to the main input and the second local oscillator input is connected to a source that provides a second local oscillator signal with an undesired sideband frequency. There are circuit for super-positioning the first output signal and the second output signal. The first local oscillator signal and the second local oscillator signal are square-wave signals.

REFERENCES:
patent: 5220683 (1993-06-01), Rudish
patent: 6094569 (2000-07-01), Wang
patent: 6397051 (2002-05-01), Abbasi et al.
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patent: 2006/0040634 (2006-02-01), Wang
patent: 0322024 (1989-06-01), None
patent: 0322024 (1989-06-01), None

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