Did You Know...
...that the Eveready Battery began as an invention called the "electric flowerpot," which was a tube with a battery and light bulb inside? The idea was to fasten this gizmo to the side of a flowerpot so it would illuminate the flowers from the bottom. The idea died on the vine and the businessman who licensed the flower pot, Conrad Huber, was left with a pile of useless tubes -- until he found a way to market them as batteries to light the world!
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| Number | Title | Issue Date |
| 8180008 | Single wire transmission without clock synchronization The present invention discloses a method for single-wire transmission without clock synchronization, comprising: providing three states; defining a spacing bit by a first state of the three states; and defining data signals, a start signal and an end signal by combi... | 05/15/2012 |
| 8164317 | Power system with temperature compensation control The present invention discloses a power system with temperature compensation control, for selectively supplying power from an external power source or a battery to a load, or charging the battery from the external power source, the power system comprising a buck con... | 04/24/2012 |
| 8159195 | Overvoltage protection circuit for use in charger circuit system and charge circuit with overvoltage protection function The present invention discloses an overvoltage protection (OVP) circuit for use in a charger circuit system, comprising: a power transistor electrically connected between a voltage supply and a battery; an OVP circuit which turns off the transistor when a voltage su... | 04/17/2012 |
| 8125204 | Two-stage power supply with feedback adjusted power supply rejection ratio The present invention discloses a power supply comprising: a switching regulator circuit converting an input voltage to an intermediate voltage; a low dropout linear regulator circuit converting the intermediate voltage to an output voltage so as to supply a load cu... | 02/28/2012 |
| 8085022 | Switching regulator and control circuit thereof, and method for determining on-time in switching regulator The present invention discloses a switching regulator and control method thereof, and a method for determining On-time in switching regulator. The switching regulator comprises: a power switch circuit including at least one power transistor switch which operates to ... | 12/27/2011 |
| 8085014 | Dual power switch with activation control and voltage regulator using same The present invention discloses a dual power switch and a voltage regulator using the dual power switch. The dual power switch comprises a PMOS power switch and an NMOS power switch connected in parallel and operating according to corresponding predetermined conditi... | 12/27/2011 |
| 8049478 | Switching regulator and method for eliminating beat oscillation The present invention discloses a switching regulator eliminating beat oscillation, comprising: a first transistor, a second transistor, and an inductor connected to a common node, wherein the first and second transistors operate to convert an input voltage to an ou... | 11/01/2011 |
| 8044920 | Backlight control circuit with low brightness variation when light emitting devices not operating The present invention discloses a backlight control circuit, and a method for controlling light emission devices. The method comprises: providing a plurality of light emission device paths connected in parallel; and setting a total current of the paths connected in ... | 10/25/2011 |
| 8022672 | Charger control circuit and charger control method The present invention discloses a charger control circuit and a charger control method for controlling a charger having a transformer, the transformer including a primary winding and a secondary winding. The charger control circuit comprises: a power switch coupled ... | 09/20/2011 |
| 7994728 | Boost driver circuit with fast discharging function The present invention discloses a boost driver circuit which converts an input voltage to an output voltage and supplies it to a load, the boost driver circuit comprising: a power transistor electrically connected with a node between the input voltage and the output... | 08/09/2011 |
| 7991172 | Half-voltage headphone driver circuit The present invention discloses a half-voltage headphone driver circuit, comprising: at least one operational amplifier providing an output to a headphone speaker, and a charge pump receiving a supply voltage (VDD), generating a positive half-voltage and a negative ... | 08/02/2011 |
| 7928509 | Integrated JFET and schottky diode The present invention discloses an integrated junction field effect transistor (JFET) and Schottky diode, comprising a depletion mode JFET which includes a source, a drain and a gate, wherein the drain is not provided with an ohmic contact such that it forms a Schot... | 04/19/2011 |
| 7893626 | Multi-color backlight control circuit and multi-color backlight control method The present invention discloses a multi-color backlight control circuit, comprising: a plurality of pins for electrically connecting with a plurality of LED strings of different LED colors; and a voltage supply circuit for receiving an input voltage and supplying a ... | 02/22/2011 |
| 7876000 | Power path control circuit The present invention provides a power path control circuit comprising: an input node for receiving an external power; a first power transistor electrically connected between the input node and a first node, for controlling power supplied from the input node to the ... | 01/25/2011 |
| 7843017 | Start-up control device A transistor having a start-up control element is provided. The transistor includes an N-type depletion mode transistor and an N-type enhancement mode transistor. The N-type depletion mode transistor includes a drain for electrically connecting to an external power ... | 11/30/2010 |
| 7808756 | Circuit and method for short circuit protection The present invention discloses a short circuit protection circuit comprising: a first input terminal; a second input terminal; an output terminal; at least two transistors including a first and a second transistors connected in series with each other and electrical... | 10/05/2010 |
| 7781921 | Voltage regulator and method for generating indicator signal in voltage regulator The subject matter is a voltage regulator capable of providing an indicator signal to a load, so that the load can operation under the best current-voltage relationship according to the indicator signal. To this end, the voltage regulator includes an amplifier for g... | 08/24/2010 |
| 7750686 | Circuit and method for matching current channels The present invention discloses a current-matching method comprising steps of: providing a plurality of current channels; grouping the plurality of current channels into W sets, each of which has Q channels; and matching the channels of the same set in current, wher... | 07/06/2010 |
| 7672393 | Single-wire asynchronous serial interface The present invention discloses a single-wire asynchronous serial interface, and a method for transmitting commands and data through one transmission wire, wherein the transmission wire is capable of transmitting signals of three level states. The disclosed interfac... | 03/02/2010 |
| 7667530 | Charge pump down circuit and method for the same The present invention discloses a charge pump down circuit which comprises three capacitors operating in three time phases. In the first time phase, the total of the voltages across the three capacitors is equal to an input voltage; in the second time phase, the vol... | 02/23/2010 |
| 7605571 | Switching regulator with lower transistor capable of two states of ON or low current The present invention discloses a switching regulator, which comprises: a first and a second transistors electrically connected with each other; a pulse width modulation control circuit for turning ON and OFF the first transistor and turning ON the second transistor... | 10/20/2009 |
| 7595596 | Power-saving control circuit and method for OLED panel The present invention discloses a power-saving control circuit for an OLED panel, comprising: a plurality of OLEDs respectively located in a corresponding plurality of paths; a current amount determination circuit determining current amounts on the plurality of path... | 09/29/2009 |
| 7573211 | Backlight control circuit The present invention discloses a backlight control circuit, comprising: a voltage supply circuit, which is a boost converter circuit for receiving an input voltage from an input terminal and generating an output voltage to an output terminal, the output voltage bei... | 08/11/2009 |
| 7570121 | Frequency jittering control circuit and method for using the same A frequency jittering control circuit wherein by means of the characteristics of a PLL whose input switches between different frequencies, the output frequency of the PLL swings between the different frequencies to achieve the desired frequency jittering. ... | 08/04/2009 |
| 7508174 | Anti-ringing switching regulator and control method therefor The present invention discloses an anti-ringing switching regulator, comprising a variable resistor, a transistor, and an inductor electrically connected to a common node, in which the variable resistor is electrically connected with an input voltage, the transistor... | 03/24/2009 |
| 7489182 | Charge pump start up circuit and method thereof The present invention discloses a charge pump start up circuit comprising: a start up transistor having one end which is electrically connected with a voltage supply source, and another end which is electrically connected to a voltage node; and a charge pump circuit... | 02/10/2009 |
