31 results about "Charge transfer switch" patented technology

A charge pump circuit utilising CMOS or MOSFET (p-channel or n-channel) configured as switches for charge transfer is proposed. Instead of using the conventional diode-connected transistors, CMOS transistors configured as switches are used so that the threshold voltage drop across the stages of the charge pump is eliminated. Two of these charge pump chains are cross-coupled to bias each other at every stage. Consequently, the charge pump presented achieves higher voltage output efficiency with a wider supply voltage range.

A switch capacitor unit for implementing a capacitive sensor includes a charging switch, a charge transfer switch, and a first switch. The charging switch is coupled between a first supply voltage and a circuit node to selectively couple a sensing capacitor to the first supply voltage through the circuit node. The charge transfer switch is coupled between the circuit node and a first terminal of a second capacitor to selectively couple the sensing capacitor through the circuit node to the second capacitor. The first switch is coupled between the circuit node and a second terminal of the second capacitor to selectively couple the second terminal to the sensing capacitor through the circuit node.

The invention provides a high-precision charge addition-subtraction transfer circuit suitable for a common CMOS process and a charge transfer control switch thereof. The charge addition-subtraction transfer circuit comprises a charge transfer switch, a first charge storage node, a first charge storage capacitor, a second charge storage node, a second charge storage capacitor and a third storage capacitor, wherein the first charge storage capacitor is connected to the first charge storage node, and the second charge storage capacitor and the third charge storage capacitor are connected to the second charge storage node. The charge addition-subtraction transfer circuit can realize accurate charge addition-subtraction operation and accurately control the quantity of transferred charge, and can be widely used in charge coupled secondary flowing water circuit at all levels in a charge coupled pipeline AD converter.

A charge pump provides high boosting efficiency with low power loss even with a heavy load. Plural charge transfer switches are connected in series forming two lines of charge transfer circuits operated by out-of-phase clock signals. Capacitors are connected to each of nodes in the charge transfer circuits. The charge transfer circuits include a first control unit, a second control unit, and a voltage comparison output unit. The second control unit includes a switch unit configured to selectively feed a signal from a previous-stage node or a later-stage node to the gate of a charge transfer switch in the second control unit, depending on the phase of the clock signal.

In addition to an input terminal, an output terminal, a ground terminal, a plurality of external terminals, and a plurality of charge transfer switches, a semiconductor integrated circuit device has a step-up factor switching terminal. Here, the plurality of charge transfer switches each have a common contact connected to corresponding one of the plurality of external terminals and two selection contacts alternatively connected to the common contact, and one of the selection contacts of the plurality of charge transfer switches is connected to the step-up factor switching terminal, and each of the other selection contacts is connected to one of the input terminal, the output terminal, the ground terminal, and the rest of the other selection contacts. With this configuration, it is possible to make the semiconductor integrated circuit device versatile so that it can be used to form charge pump circuits having different step-up factors.

The invention relates to an analog front end detection circuit used for a giant magneto-resistive (GMR) biosensor. The circuit comprises a bandgap reference voltage source, a sensor voltage generating circuit, a 5bit reference voltage generating circuit, a charge transfer switched capacitor sampling/holding circuit and a pipelined analog-to-digital converter. The analog front end detection circuit has the following beneficial effects: the methods of single chip total integration and voltage detection are adopted, thus effectively extracting the weak voltage signals in the GMR biosensor; the charge transfer switched capacitor sampling/holding circuit is utilized to sample the detection voltage of the resistor array of the GMR biosensor and reasonably amplify the detection voltage to the input voltage range of the analog-to-digital converter; and finally, the analog-to-digital converter is used for outputting the digital detection results.

The invention discloses a dynamic exposure time adjusting method for an APS (active pixel sensor) star sensor. The method comprises the following steps: (1), the size of a 4T image sensor area array is set, and the time Tus for reading one line is taken as the basic exposure unit; (2), an exposure time gear register is arranged in an FPGA (field programmable gate array), and N-gear exposure time is set; (3), according to a new exposure time gear written by a processor, a corresponding exposure adjusting formula is determined, exposure idle lines and read idle lines are obtained through calculation, read and exposure operation is controlled by switching on and off a pixel charge transfer switch in one-line time, the exposure operation is not performed when exposure is in an idle line, and the read operation is not performed when read is in an idle line; after exposure of the idle lines is finished, a rolling exposure pipeline at a new exposure time gear is entered, and setting of the new exposure time gear is finished. Seamless and dynamic adjustment of multiple-gear exposure time can be realized, the exposure pipeline is not interrupted during dynamic adjustment of the exposure time, and the data read time interval is reduced.

The invention discloses an electric vehicle with a two-way operating circulation generator. In the electric vehicle, a generator (6) is arranged at the other side of a driving wheel (3) and consists of an inner rotor (7) with a winding and an outer rotor (8) which is encircled on the circumference of the rotor and is provided with a magnet; a wheel ball bearing (9) is arranged between the outer rotor and a generator casing; a counter-driving mechanism (10) is arranged between the inner rotor and the outer rotor; the outer rotor is driven by rotating the inner rotor to enable the outer rotor to reversely rotate; a charging controller (11) is arranged and connected with the generator; the charging controller is respectively connected with a battery jar (2) and an arranged standby battery jar (13) through a charging transfer switch (12); and the battery jar (2) and the arranged standby battery jar (13) are respectively connected with a controller through a mains switch (14) and a mains switch (15). According to the invention, the defects that the traditional electric vehicle is frequently charged and the driving range is limited are overcome; and the invention has the remarkable advantages of compact structure, power recovery, energy saving, added charge capacity, reduced driving cost and greatly-increased driving range.

The oscillation prevention circuit is characterized in that a charge switch circuit and a transmission switch circuit are connected in series between the first amplifier circuit and the second amplifier circuit; The switch circuit is turned "off", and the charging switch circuit is turned "off" when the transfer switch circuit is "on", so as to prevent both switch circuits from being turned "on" at the same time.

An imaging device includes a plurality of arranged imaging elements each including: a light-receiving element configured to generate charge from received light by photoelectric conversion, a floating diffusion configured to convert the charge generated by the light-receiving element into voltage, a charge transfer switch configured to transfer the charge from the light-receiving element to the floating diffusion, a reset switch configured to reset the voltage of the floating diffusion, and a source follower configured to amplify the voltage of the floating diffusion. The reset switch is configured to reset the voltage of the floating diffusion a plurality of times for each of predetermined pixel groups in a single image data acquisition period. The charge transfer switch is configured to transfer the charge from the light-receiving element to the floating diffusion a plurality of times for each of the pixel groups in the single image data acquisition period.

A power supply circuit has: a DC/DC converter (M11, M12, L11, C11) which steps down an input voltage Vin to generate an output voltage Vout1 by rectifying and smoothing a pulsing switched voltage Vsw generated by turning on and off output switches (M11 and M12); and a charge pump (M11-M14, C12, C13) which steps up the input voltage Vin to generate an output voltage Vout2 by repeating charging and discharging of a charge accumulation capacitor (C12) by turning on and off charge transfer switches (M11-M14). First end of the charge accumulation capacitor is connected to a terminal from which the switched voltage Vsw is outputted. The output switches are also used as part of the charge transfer switches.

Provided are a charge transfer switch circuit for selectively controlling body bias voltage of a charge transfer device, and a boosted voltage generating circuit having the same. The charge transfer switch circuit may include a capacitor whose voltage is boosted based on first and second control signals, a first transistor connected between a supply voltage and the capacitor and having a gate receiving a precharge signal, a second transistor connected between a first node and a second node and having a gate connected to a terminal of the capacitor, a third transistor connected between the first node and a bulk voltage of the second transistor and having a gate receiving the first control signal, and a fourth transistor connected between the bulk voltage of the second transistor and a ground voltage and having a gate receiving the second control signal.

The invention belongs to the technical field of memories and especially relates to a compact charge transfer refresh circuit and a refresh method thereof. The compact charge transfer refresh circuit comprises an array of M*N. The array is divided into t subarrays of M*(N/t) in a row direction. The serial numbers of the subarrays are in a range of 1 to n. Virtual power ends VHn of sense amplifiers of the subarrays are connected. Virtual power ends VHn between the subarrays are connected by charge transfer switches Tn. M, N, n and t represent natural numbers. The virtual power ends of the sense amplifiers of the subarrays are connected and VHn represents the virtual power ends. The virtual power ends VHn between the subarrays are connected by the charge transfer switches Tn. The compact charge transfer refresh circuit reduces refresh power consumption, obviously reduces refresh time, has a simple control circuit and has no additional area cost.