Semiconductor device and operating method thereof
AssigneeSamsung Electronics Co., Ltd.
InventorsQing Liu, Dae Hyun Kwon, Hui Changhsiang
Life of this patent
Estimating the term…
Abstract
Provided are a semiconductor device and an operating method thereof. A semiconductor device includes a mixer configured to upconvert a baseband signal using a local oscillator (LO) signal; and a notch filter configured to receive the upconverted signal from the mixer and filter notch frequency components, the notch filter further configured to resonate at a fundamental frequency to provide a higher impedance and resonate at a notch frequency different from the fundamental frequency to provide a lower impedance.
Claims19
A semiconductor device comprising:
- a mixer configured to upconvert a baseband signal using a local oscillator (LO) signal;
- and
- a notch filter configured to receive the upconverted signal from the mixer and filter notch frequency components, the notch filter further configured to resonate at a fundamental frequency to provide a higher impedance and resonate at a notch frequency different from the fundamental frequency to provide a lower impedance,
- wherein the notch filter includes a first inductor, a second inductor connected in parallel with the first inductor, a first capacitor connected in series with the first inductor at a first end of the first inductor, and a second capacitor connected in series with the first inductor at a second end of the first inductor, and
- the fundamental frequency and the notch frequency are simultaneously tuned by the first capacitor and the second capacitor.
A semiconductor device comprising:
- a mixer configured to upconvert a baseband signal using a local oscillator (LO) signal;
- at least one resistor at an input terminal of the mixer and through which the baseband signal passes;
- and
- a notch filter configured to receive the upconverted signal from the mixer and filter notch frequency components, the notch filter further configured to resonate at a fundamental frequency to provide a higher impedance and resonate at a notch frequency different from the fundamental frequency to provide a lower impedance, the at least one resistor has a value lower than the higher impedance and higher than the lower impedance.
A notch filter comprising:
- a first capacitor;
- a first inductor;
- a second capacitor, connected in series with the first inductor and the first capacitor between a first node and a second node, the first and second capacitors being configured to resonate together at a notch frequency to reduce a third harmonic of upconverted first and second baseband signals received at the first and second nodes, respectively;
- and
- a second inductor connected between the first node and the second node in parallel with the first inductor, the first and second inductors being configured to resonate together at a fundamental frequency to provide a higher impedance at the fundamental frequency, wherein
- the fundamental frequency and the notch frequency are simultaneously tuned by the first capacitor and the second capacitor.
Dependencies are inferred from the claim text.