Abstract: An inductor device includes an 8-shaped inductor and a ring-type wire. The ring-type wire is disposed around an outer side of the 8-shaped inductor. The 8-shaped inductor includes an input terminal and a center-tapped terminal. The input terminal of the 8-shaped inductor is located on a first side of the inductor device, and the center-tapped terminal is located on a second side of the inductor device. The ring-type wire includes an input terminal and a ground terminal. The input terminal of the ring-type wire is located on the first side of the inductor device, and the ground terminal is located on the second side of the inductor device. The input terminal of the ring-type wire is coupled to the input terminal of the 8-shaped inductor.

Abstract: An inductor device includes an 8-shaped inductor and a ring-type wire. The ring-type wire is disposed around an outer side of the 8-shaped inductor. The 8-shaped inductor includes an input terminal and a center-tapped terminal. The input terminal of the 8-shaped inductor is located on a first side of the inductor device, and the center-tapped terminal is located on a second side of the inductor device. The ring-type wire includes an input terminal and a ground terminal. The input terminal of the ring-type wire is located on the first side of the inductor device, and the ground terminal is located on the second side of the inductor device. The input terminal of the ring-type wire is coupled to the input terminal of the 8-shaped inductor.

Abstract: An oscillation circuit including an amplifier, a feedback resistor and a first switch circuit is provided. The amplifier inverts and amplifies an oscillation signal received from an input terminal thereof to provide an output oscillation signal at an output terminal thereof. The feedback resistor is coupled between the input terminal and the output terminal, and coupled with the first switch circuit in parallel. The first switch circuit conducts the input terminal to the output terminal in one of the following situations: (1) an input voltage of the oscillation signal is higher than an output voltage of the output oscillation signal by at least a first threshold value; and (2) the output voltage is higher than the input voltage by at least a second threshold value. The first switch circuit has a first on-state resistance smaller than a resistance of the feedback resistor.

Abstract: An oscillation circuit including an amplifier, a feedback resistor and a first switch circuit is provided. The amplifier inverts and amplifies an oscillation signal received from an input terminal thereof to provide an output oscillation signal at an output terminal thereof. The feedback resistor is coupled between the input terminal and the output terminal, and coupled with the first switch circuit in parallel. The first switch circuit conducts the input terminal to the output terminal in one of the following situations: (1) an input voltage of the oscillation signal is higher than an output voltage of the output oscillation signal by at least a first threshold value; and (2) the output voltage is higher than the input voltage by at least a second threshold value. The first switch circuit has a first on-state resistance smaller than a resistance of the feedback resistor.

Abstract: An oscillating signal generator circuit includes an oscillator circuit, a feedback circuit, and a voltage regulator circuit. The oscillator circuit is configured to generate a first and second oscillating signal at a first and second output terminal according to a first reference voltage. The first and second oscillating signals are a differential pair of signals. The oscillator circuit includes a common mode sensing circuit coupled between the first and second output terminals. The common mode sensing circuit is configured to sense a common mode component of the first and second oscillating signals so as to generate a sense voltage. The feedback circuit, coupled to the common mode sensing circuit, is configured to generate a feedback voltage according to the sense voltage. The voltage regulator circuit is coupled to the oscillator circuit and the feedback circuit, and configured to regulate a supply voltage so as to generate the first reference voltage.

Abstract: An oscillating signal generator circuit includes an oscillator circuit, a feedback circuit, and a voltage regulator circuit. The oscillator circuit is configured to generate a first and second oscillating signal at a first and second output terminal according to a first reference voltage. The first and second oscillating signals are a differential pair of signals. The oscillator circuit includes a common mode sensing circuit coupled between the first and second output terminals. The common mode sensing circuit is configured to sense a common mode component of the first and second oscillating signals so as to generate a sense voltage. The feedback circuit, coupled to the common mode sensing circuit, is configured to generate a feedback voltage according to the sense voltage. The voltage regulator circuit is coupled to the oscillator circuit and the feedback circuit, and configured to regulate a supply voltage so as to generate the first reference voltage.

Abstract: A filtering circuit includes a filter, a frequency divider, and a control circuit. The filter is configured to generate a first oscillating signal according to a control signal in a first mode, and perform a filtering process according to the control signal in a second mode. A frequency of the first oscillating signal is determined according to the control signal. The frequency divider is coupled to the filter and configured to divide the frequency of the first oscillating signal to generate a frequency-divided signal. The control circuit is coupled to the filter and the frequency divider, and configured to compare a frequency of the frequency-divided signal and a frequency of a second oscillating signal so as to adjust the control signal in the first mode. A center frequency of a passband of the filter in the second mode is determined according to the adjusted control signal.

Abstract: An inductor device includes an 8-shaped inductor and a ring-type wire. The ring-type wire is disposed around an outer side of the 8-shaped inductor. The 8-shaped inductor includes an input terminal and a center-tapped terminal. The input terminal of the 8-shaped inductor is located on a first side of the inductor device, and the center-tapped terminal is located on a second side of the inductor device. The ring-type wire includes an input terminal and a ground terminal. The input terminal of the ring-type wire is located on the first side of the inductor device, and the ground terminal is located on the second side of the inductor device. The input terminal of the ring-type wire is coupled to the input terminal of the 8-shaped inductor.

Abstract: A power amplifying system includes a voltage control oscillator (VCO), a frequency divider, a mixer and an adding amplifier. The VCO is configured to provide an input signal having a frequency that is a non-integer multiple of a predetermined frequency. The frequency divider is coupled to the VCO, and configured to receive the input signal and perform frequency division upon the input signal to respectively generate an in-phase signal and a quadrature signal corresponding to the input signal. The mixer is coupled to the VCO and the frequency divider, and configured to mix the input signal transmitted from the VCO and the in-phase signal transmitted from the frequency divider to output a mixed signal. The adding amplifier is coupled to the mixer and the frequency divider, and configured to integrate the mixed signal and the quadrature signal to generate an output signal having the predetermined frequency.

Abstract: A semiconductor package structure is disclosed. The semiconductor package structure comprises a plurality of layered structures, a plurality of wires, and a first ring structure. The wires are connected to each of the layered structures. The first ring structure is coupled to at least one of the layered structures and positioned between the wires.

Abstract: Disclosed is a voltage regulator. The voltage regulator includes a reference voltage circuit, a noise cancellation circuit, an error amplifier, a pass transistor and a voltage divider. The voltage regulator can cancel the noise generated by the reference voltage circuit and the error amplifier, and also can improve its Power Supply Rejection Ratio (PSRR).

Abstract: A semiconductor package structure is disclosed. The semiconductor package structure comprises a plurality of layered structures, a plurality of wires, and a first ring structure. The wires are connected to each of the layered structures. The first ring structure is coupled to at least one of the layered structures and positioned between the wires.

Abstract: Disclosed is a voltage regulator. The voltage regulator includes a reference voltage circuit, a noise cancellation circuit, an error amplifier, a pass transistor and a voltage divider. The voltage regulator can cancel the noise generated by the reference voltage circuit and the error amplifier, and also can improve its Power Supply Rejection Ratio (PSRR).

Abstract: A transistor voltage-controlled oscillator (VCO) and a frequency synthesizer having the transistor VCO are provided. The frequency synthesizer adopts a divide-by-five injection-locked frequency divider, which includes a five-stage inverter ring oscillating frequency dividing circuit for reducing the operating frequency of the oscillating signal from the VCO, thus decreasing power consumption due to counting operation of the frequency synthesizer. The transistor VCO includes three transistor switching capacitor sets connected in parallel to one another to form a parallel structure. The gates of the transistor switching capacitor sets are connected to respective operating voltage sources, so as to switch the status of the corresponding transistor switching capacitor set, which in turn adjusts the harmonic frequency generated by the VCO, thereby allowing the VCO to generate a corresponding operating frequency with enough bandwidth.

Abstract: A transistor single-pole-single-throw circuit device includes at least a transistor single-pole-single-throw circuit having a first transistor and a second transistor, and an inductor capacitor (LC) resonator having an inductor and a capacitor connected in series, allowing two ends of the LC resonator connected to the first source and the first drain of the first transistor, respectively. The transistor single-pole-single-throw circuit device adopts an LC resonator having an inductor and a capacitor connected in series to connect with the first source and the first drain of the first transistor. The inductor couples and resonates with a parasitic capacitance of the transistor, to reduce signal loss due to emerged parasitic capacitance when the conventional single-pole-single-throw circuit selects a switch transistor with a larger width.

Abstract: A FET transistor voltage-controlled oscillator is provided that includes a crossed-coupled inductor capacitor tank (LC-Tank) transistor voltage-controlled circuit having a first transistor and a second transistor, as well as a transistor frequency multiplying circuit having a third transistor and a fourth transistor. In the design, the gate of the first transistor is connected to the drain of the second transistor, and the gate of the second transistor is connected to the drain of the first transistor. Then, the source of the third transistor is connected to the source of the first transistor, and the source of the fourth transistor is connected to the source of the second transistor. Last, the gate of the third transistor is connected to the gate of the fourth transistor, and the drain of the third transistor is connected to the drain of the fourth transistor.

Abstract: A low-noise amplifier is provided according to the present invention. The low-noise amplifier includes a first amplifier stage, a second amplifier stage, a third amplifier stage, an input matching network, inter-stage matching networks, and an output matching network. The impedance of the input matching network and the input impedance of the first amplifier stage are conjugate matched, thereby decreasing system power consumption and noise factor. The system gain is enhanced by cascading three stages of amplifiers.

Abstract: A transistor single-pole-single-throw circuit device includes at least a transistor single-pole-single-throw circuit having a first transistor and a second transistor, and an inductor capacitor (LC) resonator having an inductor and a capacitor connected in series, allowing two ends of the LC resonator connected to the first source and the first drain of the first transistor, respectively. The transistor single-pole-single-throw circuit device adopts an LC resonator having an inductor and a capacitor connected in series to connect with the first source and the first drain of the first transistor. The inductor couples and resonates with a parasitic capacitance of the transistor, to reduce signal loss due to emerged parasitic capacitance when the conventional single-pole-single-throw circuit selects a switch transistor with a larger width.

Abstract: A low-noise amplifier is provided according to the present invention. The low-noise amplifier includes a first amplifier stage, a second amplifier stage, a third amplifier stage, an input matching network, inter-stage matching networks, and an output matching network. The impedance of the input matching network and the input impedance of the first amplifier stage are conjugate matched, thereby decreasing system power consumption and noise factor. The system gain is enhanced by cascading three stages of amplifiers.

Abstract: A transistor voltage-controlled oscillator includes a cross-coupled LC-tank transistor voltage-controlled oscillating circuit composed of two transistors, a capacitor set, and a first transformer inductor having a first inductor coil and a second inductor coil coupled to the first inductor coil; and a second transformer inductor having a third inductor coil and a fourth inductor coil coupled to the third inductor coil. The first transformer inductor and the second transformer inductor are both used as a coupling inductor for the cross-coupled LC-tank transistor voltage-controlled oscillating circuit. As a result, the inductor area of the transistor voltage-controlled oscillator is greatly reduced and the parasitic capacitance between the inductors and the silicon substrate is reduced accordingly such that the power consumption is greatly reduced and the quality factor of the inductor is increased.