Importance

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Abstract

Electrical circuit (300, 500, 800, 900) has an input (301, 501, 801, 802, 901, 902) and an output (311, 502, OUT, I-OUT, Q-OUT). The circuit samples an input signal coupled to the input having a certain input frequency and converts the input signal into a certain output frequency at the output, the output frequency being lower than the input frequency. It comprises a first sampler circuit (302, 510, 803, 910) coupled to the input, a second sampler circuit (303, 520, 804, 920) coupled to the input, a buffering component (309, 509, 809, 903, 904) coupled to the output and buffer switching means (305-307, 514, 515, 811-818, 914, 915, 924, 925, 934, 935, 944, 945, 954, 955, 964, 965, 974, 975, 984, 985). The buffer switching means are arranged to respond to a buffering command (f.sub.s /N, A, B) by coupling said first sampler circuit and said second sampler circuit to said buffering component.

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First Claim