47 results about "Common base" patented technology

The invention belongs to the technical field of stability compensation circuits, and particularly relates to a stability compensation circuit structure of a high-speed operational amplifier, which is characterized by comprising a function module, a first control module, a second control module, a third control module, a fourth control module and a fourth control module, and the function module comprises an input stage, a differential common-base gain stage, a common-base level converter module and an output stage, and the stability compensation assembly comprises a dual-frequency load unit which is matched with the functional module and comprises a low-frequency load branch and a high-frequency load branch which are connected in parallel. Through the synergistic effect of the double-frequency load unit and the pole regulation and control capacitor, gain segmentation regulation and control of low-frequency high gain and high-frequency fast attenuation are achieved, the open-loop gain of the operational amplifier breaks through the limitation of 30dB of an existing HBT single-stage operational amplifier, and meanwhile the problem that high-frequency phase shift changes too fast is effectively restrained; through simulation verification, the phase margin can reach 67 degrees, the stability requirement of 45-60 degrees and above of an analog circuit is met, and the core contradiction that the high-gain bandwidth and the phase margin of an HBT device are difficult to balance is thoroughly overcome.

The present invention relates to the technical field of optical communications. Disclosed are a transimpedance amplifier and an optical receiver. The transimpedance amplifier comprises: a pre-amplifier, which pre-amplifier comprises a first single-sided pre-amplification circuit and a second single-sided pre-amplification circuit, which are symmetrically arranged, wherein the first single-sided pre-amplification circuit and the second single-sided pre-amplification circuit each comprise a common-emitter common-base circuit, a direct-current bias circuit and an emitter follower circuit. An input end of the common-emitter common-base circuit serves as an input end of the pre-amplifier and is connected to an optical detector; the direct-current bias circuit is connected to the common-emitter common-base circuit; the emitter follower circuit is connected to the common-emitter common-base circuit; and an output end of the emitter follower circuit serves as an output end of the pre-amplifier and is connected to a next-stage circuit of the pre-amplifier. The present invention can achieve low noise, high bandwidth and large gain.

The invention provides an offset-feed-type double-antenna combined structure configuration with co-reference of an auxiliary reflector and feed sources. The offset-feed-type double-antenna combined structure configuration comprises two main reflecting surfaces, two auxiliary reflecting surfaces, two sets of feed sources, an antenna tower, a base and a waveguide assembly, the two main reflecting surfaces and the antenna tower are arranged on the base in an L shape, the two auxiliary reflecting surfaces, the two sets of feed sources and the waveguide assembly are compactly installed on the antenna tower, and the main reflecting surfaces, the auxiliary reflecting surfaces and the feed sources keep a specified angle direction to achieve antenna ground detection. Factors of limited outer envelope, compact space, weight reduction and the like of a satellite to the ground and double antennas are comprehensively considered, the layout is compact, and installation constraints of various satellite surfaces can be fully adapted; the auxiliary reflecting surface and the feed source share one set of antenna tower, so that the weight and envelope of the system are greatly reduced, the common-reference installation precision is high, and the directional performance of the antenna is ensured; the antenna tower is of a closed structure, provides abundant installation interfaces and good heat dissipation capability for the feed source and the waveguide assembly, and is higher in adaptability.

The invention discloses a transistor amplification circuit experiment board and an experiment system. Comprising a printed circuit board, a transistor, an adjustable resistor, a plurality of wiring terminals and a plurality of pairs of contact pin sleeves are arranged on the printed circuit board, and two contact pin sleeves of each pair of contact pin sleeves are electrically isolated; an amplifying circuit with a common emitter, a common collector or a common base can be constructed by selecting a signal input port and a signal output port and inserting a capacitor and a resistor into each butt joint pin sleeve to keep an open circuit or a short circuit; the experiment system further comprises a static working voltage display circuit which is used for measuring power supply voltage and static working voltage of the base electrode, the collector electrode and the emitter electrode of the transistor. According to the invention, various bias scheme experiments such as a basic common-emitter amplification circuit experiment with an emitter grounded and a common-emitter amplification circuit experiment with an emitter with alternating current and direct current negative feedback can be carried out, and the device has the advantages that the resistors and the capacitors are all self-selected, and the connection relation of components is intuitive; students can fully understand and master the working characteristics of the transistor amplification circuit.

The application relates to a high-isolation frequency distribution circuit based on common-base amplification, which comprises a gain control amplifier, a distributor, a common-base amplification network and a filter; the gain control amplifier realizes gain control amplification of an input frequency signal and attenuated input to the distributor; the distributor realizes power distribution and isolation of the frequency signal without additional noise, and realizes multi-way output, each way of output being connected with a common-base amplification network; the common-base amplification network improves the reverse isolation characteristic of the frequency signal through the common-base triode current buffer characteristic, realizes high-isolation between multi-way output frequency signals and inputs the frequency signals to the filter; the filter suppresses the out-of-band noise of the frequency signal to reduce the harmonic and the out-of-band noise of the frequency signal. The application can realize amplification, distribution, isolation and filtering of low-noise frequency signals, improves the integration of the output frequency signal of the time-homogeneous equipment, and has the advantages of high isolation, low additional noise and the like.

An amplifier (700) includes a common emitter stage coupled to a first input (720) and a second input (725), a common base stage coupled to the common emitter stage and a first output (730) and a second output (735), and a cancellation path coupled to the common emitter stage and the common base stage and the first output and the second output. The cancellation path generates a first cancellation signal 180 degrees out of phase with a first leakage signal at the first output and a second cancellation signal 180 degrees out of phase with a second leakage signal at the second output. The cancellation path includes a first cancellation transistor (M6) coupled to the common emitter stage and the common base stage and the first output and a second cancellation transistor (M5) coupled to the common emitter stage and the common base stage and the second output.

This invention discloses a method for improving the stability and gain of a millimeter-wave differential amplifier core. The stability and gain improvement comprises common-mode rejection enhancement and differential-mode gain enhancement. The millimeter-wave differential amplifier core includes a common-emitter amplifier circuit composed of a first transistor and a second transistor, and a common-base amplifier circuit composed of a third transistor and a fourth transistor. A first bias resistor and a second bias resistor are connected in series between the two bases of the first and second transistors. A third bias resistor and a fourth bias resistor are connected in series between the two bases of the third and fourth transistors. The emitter of the third transistor is connected to the collector of the first transistor, and the emitter of the fourth transistor is connected to the collector of the second transistor. A bridging capacitor is also connected between the two bases of the third and fourth transistors. This invention significantly improves the differential-mode gain characteristics of the millimeter-wave band amplifier core while simultaneously enhancing common-mode rejection by combining series capacitors with common-mode gain reduction.

The invention relates to a contact element (1) for producing an electrical connection with contact elements (1) of like construction, comprising a female contact portion (10A), a male contact portion (10B) of matching construction and a third contact portion (10C) for electrical connection with a further component (2), wherein at least the female contact portion (10A) and male contact portion (10B) are arranged on different sides (11A, 11B) of the contact element (1). The female contact portion (10A), the male contact portion (10B) and the third contact portion (10C) are connected firmly and electrically conductively to one another via a common base member (12).

An over-current detection circuit comprises a power supply input end, a power supply output end, resistors R1 to R4, a current limiting circuit, PNP triodes Q1 and Q2, and NPN triodes Q3 and Q4. The power input end is connected with the first ends of the resistor R1 and the resistor R2, and the power output end is connected with the second end of the resistor R2 and the emitting electrode of the PNP triode Q2. The PNP triodes Q1 and Q2 share the base electrode, the emitter electrode of the Q1 is connected with the second end of the R1, the base electrode of the Q2 is in short circuit with the emitter electrode, the first end of the current limiting circuit is respectively connected with the base electrodes of the PNP triodes Q1 and Q2, and the second end of the current limiting circuit is grounded. The NPN triode Q3 and the NPN triode Q4 share the same base electrode, the collector electrode of the Q3 is connected with the collector electrode of the Q1 and is in short circuit with the base electrode of the Q3, and the emitter electrode of the Q3 is connected with the first end of the R3; the collector of the Q4 is connected with the collector of the Q2, and the emitter of the Q4 is connected with the first end of the R4; and the second ends of the resistors R3 and R4 are grounded. According to the utility model, low-cost over-current detection is realized.

Described herein is a terminal assembly (1) configured to mate in conductive contact with an electrically conductive member (6), and an electrical connector (2), the terminal assembly (1) comprising a terminal base (11) and a contact arm (12) secured to the terminal base (11), the contact arm (12) comprising a common base plate (121) secured to the terminal base (11) and two sets of contact beams (122) arranged in mirror symmetry with respect to a longitudinal axis (L) of the common base plate (121), each set of contact beams (122) configured to extend from a respective side of the common base plate (121) and to be bent back.

A common-base amplification circuit, a radio-frequency amplifier, and an electronic device. The common-base amplification circuit comprises: a first transistor, a second transistor and a decoupling unit, wherein a base electrode of the first transistor is connected to a base electrode of the second transistor; and the decoupling unit is connected between the base electrode of the first transistor and the base electrode of the second transistor, and is used for decoupling and adjusting odd harmonics and even harmonics. The decoupling unit is connected between the base electrodes of the first transistor and the second transistor, which have a common base electrode, such that odd harmonic components and even harmonic components can be independently adjusted, and harmonic control can be implemented without the need for additional matching of input and output elements, thereby simplifying the circuit structure and improving the gain of useful signals; and the even harmonic components are independently adjusted, such that a common-mode component of the circuit can also be adjusted while ensuring that a differential-mode gain remains unchanged, thereby enhancing common-mode suppression and improving the common-mode stability and comprehensive performance of a radio-frequency amplifier.

The invention relates to a device comprising a juice squeezing device and a measuring device for measuring the mass flow rate of the squeezed juice. The measuring device has a housing (1) comprising: an inlet (2) connected to the juicing device; an outlet (6); and a channel connecting the inlet (2) and the outlet (6). The channel has a first portion, a transition region (8) and a second portion (9) in the direction towards the outlet (6). The first portion, the transition region (8) and the second portion (9) have a common base (10) which extends uniformly downward to the outlet (6). In the transition region (8), the flow-through cross-section of the first portion decreases towards the second portion (9). A measuring device comprises a first electrode (11) and a second electrode (12) positioned spaced apart from each other. At least one electrode (11, 12) is positioned inside the second portion (9) and downstream of and at a distance from the transition region (8) with respect to the flow direction (S). A voltage source (17) is connected to two regions of the first electrode (11) that are distant from each other. A detection device (18) is electrically connected to the first electrode (11) and the second electrode (12).

A conversion circuit using a common base as the front stage V / I and the back stage as I / V. (1) Because the differential input stage in the analog amplifier is composed of a common emitter circuit, it hinders the development of the input signal to high frequency and high speed. For this reason, the present invention designs an input stage circuit composed of a common base circuit. We know that the f T Compared with the common-emission method, f T The bandwidth is increased by β times of the tube itself. By utilizing this advantage of the common base circuit, a wide-band, high-speed circuit can be designed. (2) The final stage is used as an I / V conversion circuit. In analog amplifiers, in order to reduce the crossover distortion caused by the large current push-pull of the end tube, the static current of the end-stage push-pull tube is usually designed to be large, which is called Class A. The design method of Class B is to only give the end tube a very small static current and allow crossover distortion to exist, in order to save costs, but it will significantly affect the sound quality. For this reason, this circuit designs a super Class A circuit. It is composed of a common base circuit and only requires the static current of Class B to eliminate crossover distortion. It reduces costs and saves energy. It belongs to analog electronics and is used in high-speed circuits or audio fields.

Aspects of the subject disclosure may include, for example, a common emitter stage having a differential input configured to receive an input signal from an input transmission line, a common base stage coupled with the common emitter stage and having a differential output configured to provide a differential output signal to an output transmission line, and a biasing network to bias the common base stage, the biasing network including components selected to limit common mode gain of the common base stage at relatively high frequencies of interest without affecting a differential mode gain of the common base stage. Other embodiments are disclosed.

This invention provides a ground-insulated acceleration and force composite sensor, relating to the field of sensor technology. It includes a housing containing an acceleration module and a force-sensitive module. The housing includes a common base and a sealed outer shell. The common base has an annular inner cavity and a positioning shaft. The force-sensitive module is installed in the annular inner cavity, and the acceleration module is mounted on the positioning shaft. The sealed outer shell surrounds the acceleration module. The force-sensitive module includes an insulating ring A. An insulating sheet A, an electrode sheet A, a force-sensitive element, an electrode sheet A, and an insulating sheet A are stacked sequentially from bottom to top outside the insulating ring A. The acceleration module includes an insulating ring B, which is sleeved outside the positioning shaft. An insulating sheet B, an electrode sheet B, an acceleration-sensitive element, an electrode sheet B, and an insulating sheet B are stacked sequentially along the axial direction outside the insulating ring B. This invention solves the problems of signal crosstalk and low testing accuracy between the acceleration module and the force-sensitive module in the prior art.

The invention relates to the field of semiconductor integrated circuit design, in particular to a broadband radio frequency amplifier with a high 1dB compression point, which comprises an input matching stage circuit, a negative feedback circuit, an active biasing circuit, an amplifying circuit and an output matching stage circuit. According to the invention, by introducing the common-base transistor which is grounded through the capacitor, the linearity of the amplifier is improved; by constructing an active bias structure, the working current of the amplifier at different temperatures is more stable, the linearity of the amplifier is further improved, and the output 1dB compression point parameter of the amplifier is improved.

The invention relates to a rapid multiple voltage amplifier circuit and method for motor driving overcurrent protection, and belongs to the technical field of motor driving. Comprising a current sensor Rsensor connected to a motor power supply circuit, a first-stage common-base amplifier composed of triodes Q0 and Q1, a second-stage cascode amplifier connected behind the first-stage amplifier, and a load source providing current for the Q0 and Q1. Voltage V1 is generated by adding voltage Vsensor to voltage generated by the current I1 and the current I5 / 2, voltage V2 is generated by the current I2, the current I5 / 2 and the negative feedback current I3 together, and amplified voltage VOUT is generated by mirror current I4 of the negative feedback current I3; wherein the current I3 is obtained through calculation of the voltage V1 and the voltage V2, and the amplification factor of the VOUT relative to the Vsensor is adjusted through the ratio of the R3 to the R2 and the ratio of the I3 to the I4. According to the invention, the amplified voltage of a certain multiple can be simply and quickly obtained.

The application discloses a terahertz broadband on-off keying modulator with stable input impedance. The application adopts a parallel common-base common-emitter differential pair, when working in a differential mode, a signal path composed of transistors Q6, Q5, Q7 and Q8 constitutes an amplification path, thereby ensuring high current gain; when working in a common mode, signals from the common-emitter transistor pair Q5 and Q8 and the common-base transistor pair Q6 and Q7 are cancelled, thereby suppressing common-mode leakage signals and further improving the on-off isolation. By adjusting the DC bias and size of the common-base transistor pair Q6 and Q7, the working frequency band is realized. The application adopts a parallel common-base common-emitter differential pair as a double-balanced differential structure OOK modulator with a bottom tail pipe, thereby realizing low on / off input impedance variation while realizing input matching, high on-off isolation and ultra-wideband.

A terminal assembly configured to fit with a conductive member to form a conductive contact therebetween. The terminal assembly comprises a terminal base and a contact arm fixed to the terminal base. The contact arm includes a common base plate fixed to the terminal base. The contact arm further includes two sets of contact beams arranged in mirror symmetry with each other relative to a longitudinal axis of the common base plate, with each set of contact beams being constructed to extend from a respective side of the common base plate and to bend back.

Embodiments of the present disclosure relate to integrated circuits including bipolar transistors. The present disclosure relates to integrated circuits and methods including one or more rows of transistors. In one embodiment, the integrated circuit includes a row of bipolar transistors, the row of bipolar transistors including a plurality of first conductive regions, a second conductive region, and a common base, the common base being located between the first conductive region and the second conductive region. An insulating trench contacts each bipolar transistor in the row of bipolar transistors. A conductive layer is located on the insulating trench and the common base, between the first conductive region. A spacer layer is located between the conductive layer and the first conductive region.

The embodiment of the present disclosure discloses a common-base radio frequency power amplifier, comprising: an input balun, an output balun, at least one transistor and a feedback circuit. Wherein, the first input end of the input balun receives a first signal; the second input end of the input balun is grounded; the emitter of the transistor is connected to the corresponding output end of the input balun; the collector of the transistor is connected to the corresponding input end of the output balun; the first output end of the output balun outputs a second signal; the second output end of the output balun is grounded; the base of the transistor is connected to the feedback circuit. The input balun, the transistor and the output balun are configured to amplify the first signal into the second signal. The feedback circuit is configured to generate a feedback signal based on the input balun and / or the output balun, and couple the feedback signal to the base of the transistor.

The utility model provides a kind of intermediate frequency amplification circuit board, comprising: intermediate frequency signal input wiring group;Intermediate frequency signal processing loop, it includes first cascade signal amplifier, intermediate frequency broadband selector, intermediate frequency matching filter, logarithmic amplifier and video signal amplifier, using common-emitter amplifying circuit structure and common-base amplifying circuit structure, intermediate frequency signal input wiring group is connected external MCU in turn through first cascade signal amplifier, intermediate frequency broadband selector, intermediate frequency matching filter, logarithmic amplifier and video signal amplifier;Tuning control loop, it includes second cascade signal amplifier, frequency-selective amplifying circuit and detection amplifier, using common-emitter amplifying circuit structure and common-base amplifying circuit structure, intermediate frequency signal input wiring group is connected external MCU in turn through second cascade signal amplifier, frequency-selective amplifying circuit and detection amplifier, tuning control loop is also connected intermediate frequency matching filter through intermediate frequency broadband selector.

The invention relates to a timed pickup circuit. Systems and methods include a plurality of electrical transducers, each of the plurality of electrical transducers including an anode and a cathode; a plurality of common base amplifiers, an input of each of the plurality of common base amplifiers being connected to a cathode of a respective one of the plurality of electrical transducers; a summation point to which an output of each of the plurality of common base amplifiers is connected; and an amplifier, wherein an input of the amplifier is connected to the summing point.

The invention discloses a spacecraft inter-satellite pointing non-common reference parameter calibration method, which comprises the following steps of: constructing an x-axis and y-axis decoupled non-common reference parameter model by adopting a vector synthesis method, representing the x-axis or the y-axis by using an m-axis, and calibrating each axis: measuring a target with a distance of L1, calculating a first synthesis constant deviation theta 1 of the m-axis, and calculating a second synthesis constant deviation theta 2 of the m-axis; the method comprises the following steps: measuring a target with a distance L2 by using an estimated value # imgabs0 # of m, calculating a second synthetic constant deviation theta 2 of an m axis, calculating an estimated value # imgabs1 # of m by using # imgabs2 # and distances L1 and L2, calculating a third synthetic constant deviation theta 3 of the m axis decoupled from the distances, and calculating a second synthetic constant deviation theta 2 of the m axis by using the estimated value # imgabs1 # of m and the estimated value # imgabs1 # of m and the distances L1 and L2. Calculating an estimated value # imgabs6 # of an m-axis angle constant deviation bm by using an estimated value # imgabs3 # of m and a distance L1 and L2 of # imgabs4 # and an estimated value # imgabs5 # of an m-axis third synthetic constant deviation to obtain an estimated value # imgabs6 # of a whole satellite small-range maneuvering certain angle; and obtaining an estimated value of an m-axis angle measurement proportionality coefficient km when the distance is L3, calculating based on # imgabs8 # and # imgabs9 # to obtain estimation of non-common-base position deviation # imgabs10 #, and obtaining parameter estimation decoupled from the distance by utilizing calibration results under two different distances, so as to reduce position constraints of a signal transmitting end and a signal receiving end.

An antenna arrangement (1), for use within a full-duplex communication channel. The antenna arrangement (1) having at least a first planar receiving antenna (4) and a transmitting antenna group with a first planar transmitting antenna (2) and a second planar transmitting antenna (3). The transmitting antennas (2, 3) and the first receiving antenna (4) are arranged with their respective main surfaces (6) parallel to a common base surface (7) around a common center of rotation (Z), wherein the planar transmitting antennas (2, 3) are arranged rotated 180° to one another around the center of rotation (Z). The first receiving antenna (4) has the same center-to-center distance (D) to both transmitting antennas (2, 3).

Power amplification system with adjustable common base bias. A power amplification system can include a cascode amplifier coupled to a radio-frequency input signal and coupled to a radio-frequency output. The power amplification system can further include a biasing component configured to apply one or more biasing signals to the cascode amplifier, the biasing component including a bias controller and one or more bias components. Each respective bias component may be coupled to a respective bias transistor.

Systems and methods include a plurality of electrical transducers, each of the plurality of electrical transducers comprising an anode and a cathode, a plurality of common-base amplifiers, an input of each of the plurality of common-base amplifiers connected to a cathode of a respective one of the plurality of electrical transducers, a summation point to which an output of each of the plurality of common-base amplifiers is connected, and an amplifier, wherein an input of the amplifier is connected to the summation point.

The application discloses a kind of bipolar under-voltage lockout protection circuits, including resistance proportional current mirror and starting circuit, resistance proportional current mirror includes LPNP1 tube, LPNP2 tube and LPNP3 tube, LPNP1 tube emitter is connected with power supply Vcc by resistance R1, LPNP2 tube emitter is connected with power supply Vcc by resistance R2;LPNP2 tube and LPNP3 tube common base, LPNP2 tube collector LPNP3 tube emitter connection, LPNP3 collector is connected with ground by resistance R3;LPNP2 tube collector is connected with bias circuit and current source;bias circuit and current source are respectively connected with the collector and base of darlington tube, the emitter of darlington tube is connected with the first end of resistance R9, and the second end of R9 is connected with the collector of NPN19 tube, the base of NPN19 tube is connected with the collector, and the emitter is grounded;With the characteristics of simple process, low power consumption, threshold voltage high precision, high reliability.

Accumulator system with a plurality of accumulator modules (2), each comprising accumulator cells, and a cabinet unit (3) housing the accumulator modules (2), which provides a storage compartment (4) for each accumulator module (2), wherein the cabinet unit (3) comprises two cabinet elements (5, 6) combined by means of a common roof hood (7) and a common base section (8), wherein a cabinet element (5, 6) comprises a frame (17) made of several welded profile elements (18), which is subdivided into sections (26) arranged one above the other in the vertical direction (16) to form storage compartments (4), wherein a support plate (19) serving as the base plate of the associated storage compartment (4) for an accumulator module (2) is provided for each section (26).wherein the receiving compartments (4) provided by the sections (26) each have internal dimensions exceeding the external dimensions of an accumulator module (2) at least in the width direction (27) to form a gap space (23), characterized in that a front cover (12) is provided for each receiving compartment (4) and is arranged on the frame (17), which is double-walled, wherein the two walls (33, 34) are spaced apart from each other leaving a free space (37).

The present invention designs a "power supply circuit with emitter current negative feedback" to solve the problem that the current voltage-stabilized power supply has a slow reaction speed to follow the lower load, and the technical solution to solve the problem is to change the differential connection large loop voltage negative feedback in the original power supply circuit to a large loop current negative feedback composed of Q5, Q6, R5, and R6 common base connection, so that the speed and frequency of the large loop current negative feedback from the R7 loop connected to the Vo terminal to the base terminal of Q7 can be greatly improved, solving the problems of time delay in the large loop negative feedback process and the problems of slow power supply tracking speed and low output frequency, and can also be integrated in a three-terminal voltage stabilizing block to reduce the volume. It belongs to analog electronic technology and is mainly used in the field of high-speed power supply.