Pole switch down converter with symmetric resonator

Details Pole switch down converter with symmetric resonator Pole switch down converter with symmetric resonator

2007-02-27

2007-02-27

Bui, Kieu-Oanh (Department: 2623)

Telecommunications

Receiver or analog modulated signal frequency converter

Plural receivers

C455S192100, C455S192200, C455S209000, C455S323000

Reexamination Certificate

active

11126035

ABSTRACT:
A pole switch down-converter with symmetric resonator which reduce the non resonating phase to approximately half of the RF carrier period of the modulated signal is proposed. The down-converter comprises a first and second λ/2 resonator for collecting RF energy, wherein a differential RF signal is coupled to the first and second λ/2 resonator, a switching means coupled at one end of the first λ/2 resonator and one end of second λ/2 resonator for connecting the first and second λ/2 resonator, a control means for controlling the switching means, and a detecting means coupled to the first and second λ/2 resonator for detecting the down-converted signal, wherein the control means is adapted to initiate in a down-conversion cycle the switching means to connect the first and second λ/2 resonator for approximate half of the RF carrier period of the modulated signal. With this pole switch down-converter adjacent RF channels can be selected and down-converted by slightly varying the pole switch repetition rate.

REFERENCES:
patent: 6061551 (2000-05-01), Sorrells et al.
patent: 6292654 (2001-09-01), Hessel et al.
patent: 6813485 (2004-11-01), Sorrells et al.
patent: 7065162 (2006-06-01), Sorrells et al.
Hernandez L et al: “A superregenerative receiver for phase and frequency modulated carriers” Circuits and Systems, 2002. ISCAS 2002. IEEE International Symposium On, vol. 3, May 29, 2002, pp. III-81-III-84, XP002299696.

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