Bizarre Patents
Cloaking System Using Optoelectronically Controlled Camouflage
A Cloaking System designed to operate in the visible light spectrum, utilizes optoelectronics and/or photonic components to conceal an object within it.
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| Number | Title | Issue Date |
| 8134355 | Semiconductor device and RFID tag using the semiconductor device A semiconductor device monitors a voltage between a reference potential and an input potential and obtains a constant output potential regardless of a value of the voltage, after the voltage exceeds a predetermined threshold voltage in such a manner that the semicon... | 03/13/2012 |
| 8089261 | Low dropout regulator compensation circuit using a load current tracking zero circuit Disclosed is a low dropout regulator that uses a load current tracking zero circuit to stabilize a feedback loop to prevent oscillations. The load current tracking zero circuit senses the DC component of the current flowing through the pass transistor of the low dro... | 01/03/2012 |
| 8067931 | Fast voltage regulators for charge pumps A digital multilevel memory system includes a charge pump and a voltage regulator for generating regulated high voltages for various memory operations. The charge pump may include a plurality of boost circuits to boost the output of the charge pump during a fast sta... | 11/29/2011 |
| 8063624 | High side high voltage switch with over current and over voltage protection A method and apparatus are described for providing a current mirror type high voltage switching circuit (60) having a reference branch (M2, M3, R1) and a tracking branch (M1, M5), where the output peak current is limited by ... | 11/22/2011 |
| 8022686 | Reference circuit with reduced current startup An apparatus is provided. The apparatus comprises a reference circuit and a startup circuit. The reference circuit is adapted to provide a startup current, while the startup circuit receives the startup current and outputs an output voltage. The startup circuit incl... | 09/20/2011 |
| 7982448 | Circuit and method for reducing overshoots in adaptively biased voltage regulators Disclosed are a circuit and a method for adaptively biasing a voltage regulator with minimal output overshoot. The circuit includes an adaptive bias current mirror circuit further including a first transistor and a second transistor, the first transistor and the sec... | 07/19/2011 |
| 7960962 | Soft-start circuit The present invention discloses a soft-start circuit having a reference signal generator, a first current generator, a second current generator, and a soft-start capacitor. The reference signal generator generates a first signal and a second signal. The first curren... | 06/14/2011 |
| 7940037 | Driver for light emitting semiconductor device An electronic device is provided comprising a driver for light emitting semiconductor devices. The driver includes a first MOS transistor (MN1) coupled with a channel to the light emitting semiconductor device at an output node. The first MOS transistor (MN | 05/10/2011 |
| 7932712 | Current-mirror circuit In a cascode current-mirror circuit which reproduces a reference current generated by a current source and outputs the reproduced reference current: the control electrodes of first and second transistors are connected; a third transistor is cascode-connected to the ... | 04/26/2011 |
| 7915883 | Constant current circuit, light emitting apparatus and power supply apparatus using that constant current circuit In a constant current circuit that supplies a constant current Ic to a circuit connected to a current output terminal, the first transistor M1 is disposed on a current path of the constant current Ic. The second transistor and the first transistor have common... | 03/29/2011 |
| 7906954 | Bias circuit A control circuit U1 comprises four PMOS transistors MP1-MP4 and receives a voltage Vn and a voltage Vss. MP1 and MP3, and, MP2 and MP4 are respectively connected in series between power supply Vdd and a fixed voltage... | 03/15/2011 |
| 7876082 | DC/DC converter and slope compensation circuit thereof A slope compensation circuit includes a first differential pair circuit, a current mirror unit, a first operating current generation circuit, and a transconductance compensation circuit. The first differential pair circuit is connected to a first current source and ... | 01/25/2011 |
| 7872463 | Current balance arrangement A current mirror arrangement comprising two transistors (11, 12) which are of different conductivity types and are each suitable for outputting a bias current (PBIAS, NBIAS) is specified. A controlled current source (13, 13′) is connected between the... | 01/18/2011 |
| 7812587 | LED drive circuit An LED driving circuit can improve characteristics. A first current increasing circuit 10i4 is constituted of a first slow regulating unit 10i41 and a post-stage first supplying circuit 10i43 | 10/12/2010 |
| 7768248 | Devices, systems and methods for generating reference current from voltage differential having low temperature coefficient Embodiments of the invention describe a reference current generator circuit having a core circuit that includes a first transistor in a first current path for conduct a first current and a second transistor in a second current path for conduct a second current. The ... | 08/03/2010 |
| 7755344 | Ultra low-voltage sub-bandgap voltage reference generator A low-voltage sub-bandgap reference circuit is disclosed. In one embodiment, the low-voltage sub-bandgap voltage reference circuit includes a differential amplifier and a first bipolar transistor with its base and collector coupled to an electrical ground. The refer... | 07/13/2010 |
| 7737676 | Series regulator circuit A low drop out series regulator circuit for generating an output voltage that does not rely on voltage feedback or require a capacitor for stable operation includes first and second current sources connected in series between a supply voltage and ground. A resistor ... | 06/15/2010 |
| 7733076 | Dual reference current generation using a single external reference resistor Circuits and methods are provided for generating reference currents. In one implementation, a circuit is provided that includes a first source and a current control circuit in communication with the first source. The first source generates a first reference current ... | 06/08/2010 |
| 7683600 | Output circuit An output circuit in accordance with one embodiment of the present invention includes: an input terminal for receiving an input signal; an output transistor connected between a first power supply and an output terminal; a current control circuit connected to the inp... | 03/23/2010 |
| 7679353 | Constant-current circuit and light-emitting diode drive device therewith A constant-current circuit includes a first transistor for supplying a current based on a control signal input to a gate of the first transistor so as to serve as a current source, a second transistor for supplying a current to a load based on the control signal inp... | 03/16/2010 |
| 7667449 | Constant current supply circuit capable of being trimmed To provide a constant current circuit which is capable of not only acquiring characteristics of various sorts of electric circuits even before a trimming adjustment is carried out, performing the trimming adjustment based upon the acquired characteristics, performin... | 02/23/2010 |
| 7595625 | Current mirror A current mirror includes at least a first and a second mirror transistors inserted between a first and a second voltage reference and connected to an input terminal and to an output terminal of the current mirror, respectively. The current mirror further includes a... | 09/29/2009 |
| 7583070 | Zero power start-up circuit for self-bias circuit An improved start-up circuit and method for self-bias circuits is described that applies a start-up voltage and current to a self-bias circuit to initialize its operation in its desired stable state. Once the self-bias circuit converges to its desired state of opera... | 09/01/2009 |
| 7573252 | Soft-start reference ramp and filter circuit A method and circuit for providing a controlled ramping and filtering to a reference voltage in a regulator circuit such that an inrush current is limited and noise coupling to an output voltage is reduced. In a typical regulator circuit a soft-start and filter circ... | 08/11/2009 |
| 7554315 | Method and apparatus for adjusting a reference A circuit includes a current divider to divide a current from a current source into a first current and a reference current. The circuit also includes a current mirror coupled to the current divider to receive the first current from the current divider and to receiv... | 06/30/2009 |
| 7554312 | DC-to-DC voltage converter According to an embodiment of the invention, a method and apparatus for DC voltage conversion are described. According to one embodiment, a voltage converter comprises a current mirror, the current mirror being coupled with a power source; a first transistor device ... | 06/30/2009 |
| 7554313 | Apparatus and method for start-up circuit without a start-up resistor A start-up circuit is provided. In one embodiment, the start-up circuit operates as follows. In this embodiment, the start-up circuit includes a depletion-mode PMOS transistor and an NMOS switch. The NMOS switch is coupled between ground and a common gate node of a ... | 06/30/2009 |
| 7554314 | Current mirror circuit for reducing chip size A current mirror circuit includes transistors having bases coupled together and emitters connected to a voltage line. The current mirror circuit further includes a zener diode having an anode connected to the bases and a cathode connected to the voltage line. When a... | 06/30/2009 |
| 7550958 | Bandgap voltage generating circuit and relevant device using the same A bandgap voltage generating circuit includes a circuit coupled to a first node and a second node, driving the first and the second nodes to the same voltage level. A first impedance element is coupled to the first node and a second impedance element is coupled to t... | 06/23/2009 |
| 7548051 | Low drop out voltage regulator A low drop out voltage regulator, comprising first and second field effect transistors arranged in series between a regulator input and a regulator output; a third field effect transistor co-operating with the first field effect transistor to form a first current mi... | 06/16/2009 |
| 7495426 | Temperature setpoint circuit with hysteresis A temperature setpoint circuit comprises bipolar transistors Q1 and Q2 which receive currents I1 and I2 at their respective collectors and are operated at unequal current densities, with a resistance R1 connected between their base... | 02/24/2009 |
| 7463013 | Regulated current mirror A regulated mirror current source circuit has an output transistor, a regulator for controlling the output circuit, and a current mirror having two or more current paths. The first path of the mirror is coupled in series with a current path of the output circuit, an... | 12/09/2008 |
| 7449873 | Voltage controlled current source device An integrated voltage controlled current source device is provided, that extends the high accuracy, low drift output current over a large current range, and provides more headroom and better power efficiency than the standard shunt resistor and INA (instrumentation ... | 11/11/2008 |
| 7440249 | Undervoltage detection circuit An undervoltage detection circuit includes a first transistor and a second transistor coupled to a supply voltage node and arranged to form a current mirror. The undervoltage detection circuit also includes a first bipolar transistor and a second bipolar transistor.... | 10/21/2008 |
| 7436245 | Variable sub-bandgap reference voltage generator A sub-bandgap reference voltage generator, generates a pair of variable voltages one having a positive temperature coefficient and one having a negative voltage coefficient. The pair of voltages are added to generate an output voltage whose value and temperature may... | 10/14/2008 |
| 7432696 | Apparatus and method for low input voltage current mirror circuit A low-voltage current mirror circuit is provided. The low-voltage current mirror circuit includes a current mirror including first and second transistors, a buffer circuit, and a third transistor. The first transistor is the input transistor to the low-voltage curre... | 10/07/2008 |
| 7429854 | CMOS current mirror circuit and reference current/voltage circuit Disclosed is a CMOS current mirror circuit including a first MOS transistor and a second MOS transistor constituting a current mirror, in which a drain of the first MOS transistor and a gate of the second MOS transistor are connected in common, a source of the first... | 09/30/2008 |
| 7425870 | Current mirror circuit There is disclosed a current mirror circuit comprising a first transistor having a first electrode connected to a first potential, a second electrode connected to a second potential lower than the first potential, and a third electrode connected to a third potential... | 09/16/2008 |
| 7417415 | Voltage-controlled current source A voltage-controlled current source (VCCS) is provided. The VCCS controls an output current according to a controlling voltage. The VCCS includes an operational amplifier (OP-amplifier), a transistor, a resistor and a current mirror. The present invention utilizes t... | 08/26/2008 |
| 7411442 | Constant current circuit operating independent of temperature In CMOS processing, there may be a case in which a resistance element, such as a poly-silicon resistance, or the like, may be formed which has negative temperature characteristics. In a constant current circuit using this resistance element, a constant current outpu... | 08/12/2008 |
