6results about How to "High rejection ratio" patented technology

The invention discloses an OCL-LDO circuit which comprises a band-gap reference unit, a super source follower, a biasing circuit, a power transistor MP, an error amplifier, a flip voltage follower, a frequency compensation unit and a high-pass network. The invention introduces a unique output-capacitance-free low dropout regulator (OCL-LDO), and the core of the regulator is a flip voltage follower (FVF) which is embedded with a super source follower (SSF) and a high-pass network and has push-pull capability. According to the structure, the super source follower (SSF) with a high-pass network is ingeniously fused and is embedded in the flipping voltage follower (FVF), so that the transient response is remarkably improved.

The utility model discloses a band-gap reference voltage source with high power supply rejection ratio and low offset. The reference voltage source comprises a band-gap core circuit and a pre-voltage-stabilizing circuit. The band-gap core circuit can generate a reference voltage VBG with high precision and low temperature coefficient; the pre-voltage-stabilizing circuit is used for increasing the power supply rejection ratio (PSRR) of the reference voltage VBG. The output reference voltage VBG has the advantages of high power supply rejection ratio, low temperature coefficient, low imbalance, high precision and the like, and is particularly suitable for a high-precision linear Hall sensor.

The invention discloses a current mode band-gap reference circuit with a full MOS (Metal Oxide Semiconductor) structure, which is suitable for a deep submicron CMOS (Complementary Metal Oxide Semiconductor) process. The circuit comprises a starting circuit, a bias voltage generating circuit, a reference current generating circuit and a self-bias low-voltage Cascode circuit. The starting circuit is ensured to quickly enter a working state through reasonable MOS tube configuration; the bias voltage generation circuit utilizes a multi-stage complementary MOS structure to realize efficient temperature compensation; the reference current generating circuit generates stable reference current through a negative feedback structure of the operational amplifier; according to the self-biased low-voltage Cascode circuit, the power supply rejection ratio and the output impedance are improved through multi-stage stacking, and the precision and the stability of reference voltage are ensured. The reference voltage and current source circuit has the advantages of low power consumption, high precision, strong robustness and the like, and can be widely applied to reference voltage and current source design of analog integrated circuits.

The application relates to a direction-finding method based on array-received data reconstruction, and belongs to the technical field of array signal processing. The application first calculates the covariance matrix of array-received signals, then combines the array flow characteristics to use the elements in the covariance matrix to perform array-received data reconstruction, and finally performs direction finding based on the reconstructed received data matrix, so that the processing gain and the direction-finding precision are further improved. The application can improve the processing gain of array signals and the spatial resolution of array direction finding without increasing the number of array elements and the array aperture. Compared with the traditional beam synthesis method, the application has higher direction-finding precision and sidelobe suppression ratio.

The invention discloses a high-power low-ripple high-efficiency hybrid structure linear power supply and a working method, and relates to the technical field of electronics. Comprising a reference source module, a power operational amplifier module, an MOS (Metal Oxide Semiconductor) linear voltage regulation module, a voltage and power judgment module, and a first switch module and a second switch module which are used for gating the power operational amplifier module or the MOS linear voltage regulation module. The reference source module serves as a reference circuit and is used for outputting a reference voltage signal to the common end of the first switch module and controlling the reference voltage signal to be output to the power operational amplifier module or the MOS linear voltage regulating module through the first switch module. According to the invention, the optimal working mode is dynamically selected in a full-power range, the output characteristics of high precision, low ripple and high efficiency are realized, the overall energy efficiency and practicability of the power supply are effectively improved, the power consumption and temperature rise of the adjusting tube can be obviously reduced during high-power or low-dropout output, the long-term operation reliability of the power supply is ensured, and the heat dissipation design is simplified.

This application provides a wideband high power supply rejection ratio (PSRR) bandgap reference circuit. The wideband high PSRR bandgap reference circuit includes: one end of a voltage divider circuit electrically connected to a signal source, and the other end of the voltage divider circuit electrically connected to one end of a first PSRR enhancement circuit; one end of a reference voltage circuit electrically connected to the other end of the first PSRR enhancement circuit, and the other end of the reference voltage circuit electrically connected to one end of a second PSRR enhancement circuit, with the other end of the second PSRR enhancement circuit serving as the output. This method significantly improves the PSRR characteristics of the output voltage at low and medium frequencies, and better achieves a high PSRR characteristic for the output voltage over a wide frequency range.