38results about How to "Reduce pre-charge time" patented technology

A high voltage generation circuit comprises a first boosting unit, a second boosting unit, a delay circuit which delays the output of the first boosting unit as applied the second boosting unit, a pre-charge unit, and switch units which connect respective nodes in response to control signals. A voltage supply circuit is also provided that converts an externally supplied power source voltage (VCC) to a predetermined pre-charge voltage (VPP2).

A semiconductor memory apparatus includes a main bank configured to combine a first sub bank and a second sub bank. A center bitline sense amplifier array is arranged in a region where the first sub bank meets the second sub bank. A first precharge section is arranged above the first sub bank and a second precharge section is arranged below the second sub bank. The first precharge section precharges local input / output lines of the first sub bank and the second sub bank and the second precharge section precharges the local input / output lines.

The invention provides a precharge time regulating device, a precharge time regulating method, a display drive circuit and a display device. The precharge time regulating device is applied to a liquid crystal display device, and comprises a polarity reversing signal judgment unit used for generating a precharge control signal when the polarity reversing signal judgment unit judges out that all continuous M frames of potential of an actual polarity reversing signal are at negative electrical level or all N frames of potential of the actual polarity reversing signal are at positive electrical level, and a data latching control unit which is connected with the polarity reversing signal judgment unit, and used for controlling shortening of precharge time of the corresponding frames by controlling change of waveform of a data latching signal when the data latching control unit receives the precharge control signal, wherein M and N are both positive integers larger than 1. The precharge time regulating device solves the problem of poor flicker phenomena in the prior art.

A memory and a sensitive amplifier, the sensitive amplifier includes a current mirror unit, the current mirror unit includes: an input transistor with a control terminal, a first terminal and a second terminal, the second terminal of which is connected to a data line node, and the first terminal of which connected to a voltage source; a mirror transistor having a control terminal, a first terminal and a second terminal, the second terminal of which is connected to the data node, the first terminal of which is connected to the voltage source, and the control terminal of which is connected to the control terminal of the input transistor; the first impedance element, Its first end is connected to the second end of the input transistor, and the second end of the first impedance element is connected to the control end of the input transistor; the pull-up current source, one end of which is connected to the first end of the first impedance element, and the other end is connected to the voltage source; a pull-down current source, one end of which is connected to the second end of the first impedance element, and the other end is grounded, and the current value of the pull-down current source is equal to the current value of the pull-up current source. The sensitive amplifier of the invention improves the reading speed of the memory under the lower operating voltage source.

The invention discloses an electric vehicle and its charger and a charger control method, comprising: a pre-charging switch; a pre-charging resistor connected to the pre-charging switch and a first pre-charging capacity; an AC switch; and the AC switch, the pre-charging resistor An AC module connected to the first pre-charging capacitor; a second pre-charging capacitor connected in parallel to the AC module; a low-voltage DC module connected in parallel to the second pre-charging capacitor, the low-voltage DC module is connected to a low-voltage battery pack; a controller for controlling the low-voltage The DC module precharges the second precharging capacitor, and after the voltage of the second precharging capacitor is greater than the first preset threshold and less than the second preset threshold, closes the precharging switch to charge the first precharging capacitor through the power grid. charging, and after the first pre-charging capacitor is pre-charged, close the AC switch. Therefore, the time for precharging can be greatly reduced, thereby effectively avoiding a large current generated when the relay is pulled in, preventing the relay from sintering, and improving the reliability of the system.