摘要:
A voltage-controlled oscillator (VCO) module including a first VCO unit, a second VCO unit, and a matching circuit is provided. The first VCO unit includes a first terminal and a second terminal and generates a first oscillator signal. The second VCO unit is coupled to the first VCO unit and generates a second oscillator signal. The matching circuit is coupled between the first VCO unit and second VCO unit. The matching circuit includes a plurality of inductor modules respectively coupled between the first terminal of the first VCO unit and the second VCO unit, between the first terminal and the second terminal of the first VCO unit, and between the second terminal of the first VCO unit and the second VCO unit. Furthermore, a method for generating oscillator signals is also provided.
摘要:
A radio frequency (RF) front-end circuit and an operating method thereof are provided. The proposed RF front-end circuit includes a first linear amplifier, a second linear amplifier, and a calibration unit. The first linear amplifier performs a high-frequency amplification on a RF signal to generate an amplified RF signal, and down-converts the amplified RF signal into an intermediate frequency (IF) signal. The second first linear amplifier performs a low-frequency amplification on the IF signal to generate an amplified IF signal. The calibration unit is coupled to the first and the second linear amplifiers, and receives a voltage gain fed back from the second linear amplifier. Then, the calibration unit performs an auto-calibration procedure according to the voltage gain fed back from the second linear amplifier to search for an input current value of the first linear amplifier, which correspondingly maximizes the voltage gain of the first amplifier.
摘要:
A radio frequency (RF) front-end circuit and an operating method thereof are provided. The proposed RF front-end circuit includes a first linear amplifier, a second linear amplifier, and a calibration unit. The first linear amplifier performs a high-frequency amplification on a RF signal to generate an amplified RF signal, and down-converts the amplified RF signal into an intermediate frequency (IF) signal. The second first linear amplifier performs a low-frequency amplification on the IF signal to generate an amplified IF signal. The calibration unit is coupled to the first and the second linear amplifiers, and receives a voltage gain fed back from the second linear amplifier. Then, the calibration unit performs an auto-calibration procedure according to the voltage gain fed back from the second linear amplifier to search for an input current value of the first linear amplifier, which correspondingly maximizes the voltage gain of the first amplifier.
摘要:
An apparatus for clock skew compensation is provided. The apparatus includes a first delay locked loop (DLL) module disposed in a first die and a second DLL module disposed in a second die. A first input terminal of the first DLL module receives a reference clock. A first input terminal of the second DLL module is electrically connected to an output terminal of the first DLL module. An output terminal of the second DLL module is electrically connected to a second input terminal of the first DLL module.
摘要:
The present invention relates to a jitter measuring system, comprising: a delay circuit for receiving a clock signal and delaying the clock signal to generate a delay signal; a jitter amplifier for receiving the clock signal and delay signal to generate a first signal and a second signal; and a converter for converting a phase different between the first signal and the second signal into a relevant digital code; wherein the phase difference between the first signal and the second signal is an amplification of jitter.
摘要:
A voltage-controlled oscillator (VCO) module including a first VCO unit, a second VCO unit, and a matching circuit is provided. The first VCO unit includes a first terminal and a second terminal and generates a first oscillator signal. The second VCO unit is coupled to the first VCO unit and generates a second oscillator signal. The matching circuit is coupled between the first VCO unit and second VCO unit. The matching circuit includes a plurality of inductor modules respectively coupled between the first terminal of the first VCO unit and the second VCO unit, between the first terminal and the second terminal of the first VCO unit, and between the second terminal of the first VCO unit and the second VCO unit. Furthermore, a method for generating oscillator signals is also provided.
摘要:
An apparatus for clock skew compensation is provided. The apparatus includes a first delay locked loop (DLL) module disposed in a first die and a second DLL module disposed in a second die. A first input terminal of the first DLL module receives a reference clock. A first input terminal of the second DLL module is electrically connected to an output terminal of the first DLL module. An output terminal of the second DLL module is electrically connected to a second input terminal of the first DLL module.
摘要:
The present invention relates to a jitter measuring system, comprising: a delay circuit for receiving a clock signal and delaying the clock signal to generate a delay signal; a jitter amplifier for receiving the clock signal and delay signal to generate a first signal and a second signal; and a converter for converting a phase different between the first signal and the second signal into a relevant digital code; wherein the phase difference between the first signal and the second signal is an amplification of jitter.