Receiving circuit including balun circuit and notch filter and operating method thereof
AssigneeSamsung Electronics Co., Ltd.
InventorsHee-Hyun Lee, Yun-Young Choi, Jong-Won Choi, Hoon-Tae Kim
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Abstract
Provided are a receiving circuit including a balun circuit and a notch filter, and an operating method thereof. The receiving circuit includes a transformer, a notch filter, and a mixer. The transformer converts a single input signal to a differential input signal using a first tap. The notch filter blocks a specific frequency band of the single input signal by connecting a second tap with the first tap of the transformer using a condenser.
Claims15
A receiving circuit performing a balun circuit function and a notch filter function, the receiving circuit comprising:
- a transformer for converting a single input signal into a differential input signal using a first tap;
- a notch filter for cutting a specific frequency band of the single input signal by connecting a second tap with the first tap of the transformer using at least one condenser;
- and
- a mixer for outputting a signal of a desired frequency by mixing a differential input signal output via the first tap of the transformer with a local oscillation frequency.
A receiving circuit comprising a balun circuit and a notch filter, the receiving circuit comprising:
- a transformer for converting a single input signal to a differential input signal using a first tap;
- a notch filter for blocking a specific frequency band of the single input signal at a second tap using a mutual inductor characteristic of the transformer;
- and
- a mixer for outputting a signal of a desired frequency by mixing a signal having an attenuated specific frequency band among differential input signals output via the first tap of the transformer with a local oscillation frequency.
A receiving method of a receiver comprising a balun circuit and a notch filter, the method comprising:
- estimating a Received Signal Strength Indication (RSSI) of a signal received via an antenna;
- determining a radio wave environment by comparing the estimated RSSI with a threshold;
- and
- switching between functions of the balun circuit and the notch filter depending on the determination result of the radio wave environment.
Dependencies are inferred from the claim text.