4 results about "Gilbert cell" patented technology

The invention discloses an impedance-invariant vector synthesis phase shifter, an array element and a phased array, and relates to the technical field of phased array design. According to the impedance-invariant vector synthesis phase shifter provided by the invention, two capacitive compensation branches are arranged in each Gilbert unit of a variable gain amplifier, and the capacitive compensation branches are connected to a circuit only when bits are turned off, so that the output impedance of the unit is kept unchanged when the bits are turned on and turned off, and the output impedance of the unit is not changed when the bits are turned off. The phase shifting precision of the phase shifter is effectively improved, the root mean square phase error of the phase shifter is reduced to be within the acceptable range of the engineering field, phase shifting is directly carried out according to the most ideal condition based on IQ orthogonal signals, complicated calibration work is avoided, and the calibration problem of the vector synthesis phase shifter is solved. The invention further provides an array element which adopts the impedance-invariant vector synthesis phase shifter, the continuous time linear equalizer and the current mode attenuator and has the advantage of being convenient to deploy.

This invention relates to a wideband, low-error 6-bit active vector synthesis phase shifter for phase control of radio frequency signals. It includes an orthogonal signal generator, a wideband input matching network for the I / Q branch, a variable gain amplifier for the I / Q branch, a wideband output matching network, and a shift register. The orthogonal signal generator employs an RL multiphase filter (RLPP) based on a transformer structure, reducing losses caused by capacitive loads, saving space, and implementing a two-stage cascaded structure to extend bandwidth. An electromagnetically coupled resonator is used as the input and output wideband matching network for the variable gain amplifier, effectively extending the circuit bandwidth. Furthermore, a variable gain amplifier with adjustable tail current is designed, connected to two current mirror arrays through the tail current node in a Gilbert cell structure, enabling coarse and fine phase shift control of the phase shifter, thereby improving the phase shift accuracy.

The invention discloses a high-precision adjustable large-swing range integrated multi-channel driving circuit, on one hand, a pre-stage gain adjustable circuit is adopted to calibrate gain deviation and realize multi-channel integration, and on the other hand, a post-stage large-swing adjustable output stage circuit is adopted to realize multi-channel integration by combining digital coarse tuning and analog fine tuning functions. And the large-range high-precision adjustment of the output signal amplitude is realized. The driving circuit adopts a BiCMOS (Bipolar Complementary Metal-Oxide-Semiconductor Transistor) process, and a pre-stage gain adjustable circuit realizes gain deviation calibration through an improved Gilbert unit circuit structure and is compatible with a multi-channel integration function. Besides, a rear-stage large-swing adjustable output stage circuit controls the on-off of a tail current source through a switch, so that the swing range of an output signal reaches 3.0 V, and the tail current source of the current mode logic circuit is continuously adjusted within a certain range by integrating a 14-bit digital-to-analog converter circuit. And the fine adjustment resolution of the output signal amplitude is less than 0.2 mV.

The application discloses an impedance-invariant vector synthesis phase shifter, an array element and a phased array, and relates to the technical field of phased array design. The application provides the impedance-invariant vector synthesis phase shifter, two capacitive compensation branches are arranged in each Gilbert cell of a variable gain amplifier, and the capacitive compensation branches are only connected to the circuit when the bit is turned off, so that the output impedance of the cell remains unchanged when the bit is turned on and turned off, the phase shifting precision of the phase shifter is effectively improved, the root mean square phase error of the phase shifter is reduced to the acceptable range in the engineering field, the phase shifting is directly carried out according to the most ideal condition based on the IQ quadrature signal, the complicated calibration work is avoided, and the calibration problem of the vector synthesis phase shifter is solved. The application further provides the array element, which adopts the impedance-invariant vector synthesis phase shifter, a continuous time linear equalizer and a current mode attenuator, and has the advantage of convenient deployment.