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| Number | Title | Issue Date |
| 8188785 | Mixed-mode circuits and methods of producing a reference current and a reference voltage In an embodiment, a circuit includes a first transistor having a first current electrode, a control electrode, and a second current electrode coupled to a power supply terminal. The circuit further includes a resistive element having a first terminal coupled to the ... | 05/29/2012 |
| 8183914 | Constant Gm circuit and methods Structures and methods for providing a temperature independent constant current reference are provided. A constant Gm circuit is disclosed with embodiments including a voltage controlled resistor providing a current into a current mirror, the current mirror sinking ... | 05/22/2012 |
| 8159285 | Current supply circuit A current supply circuit according to an embodiment of the present invention includes an operational amplifier having first and second input terminals and an output terminal, a transistor having a control terminal connected to the output terminal of the operational ... | 04/17/2012 |
| 8130030 | Interfacing between differing voltage level requirements in an integrated circuit system A method includes controllably generating a first bias voltage from a supply voltage to be within an upper tolerable limit of an operating voltage of an IO receiver, and controllably generating a second bias voltage from an external voltage supplied through an IO pa... | 03/06/2012 |
| 8125267 | Bias voltage generation to protect input/output (IO) circuits during a failsafe operation and a tolerant operation A method includes controllably generating a first bias voltage from a supply voltage to be within an upper tolerable limit of an operating voltage of one or more constituent active circuit element(s) of an Input/Output (IO) core device of an integrated circuit (IC) ... | 02/28/2012 |
| 8026757 | Current mirror circuit, in particular for a non-volatile memory device A current mirror circuit is provided with a first current mirror including first and second mirror transistors sharing a common control terminal; the first mirror transistor has a conduction terminal for receiving, during a first operating condition, a first referen... | 09/27/2011 |
| 8004350 | Impedance transformation with transistor circuits An impedance transformation circuit utilizes two transistor circuits. ... | 08/23/2011 |
| 7990207 | Constant voltage circuit, constant voltage supply system and constant voltage supply method An input voltage signal VIN to be inputted to a gate terminal of a PMOS transistor M1 is converted to a voltage value which was level shifted at the source terminal by an inter-terminal voltage between the gate and source of the PMOS transistor M1. Thi... | 08/02/2011 |
| 7982531 | Reference voltage generating circuit and power supply device using the same A reference voltage generating circuit for generating a reference voltage includes MOSFETs connected to each other. At least one of the MOSFETs includes a control gate and a floating gate that is made hole-rich or discharged by ultraviolet irradiation, and the refer... | 07/19/2011 |
| 7936208 | Bias circuit for a MOS device A method and circuit for providing a bias voltage to a MOS device is disclosed. The method and circuit comprise utilizing at least one diode connected circuit to provide a voltage that tracks process, voltage and temperature variations of a semiconductor device. The... | 05/03/2011 |
| 7936209 | I/O buffer with low voltage semiconductor devices Described embodiments provide for protecting from DC and transient over-voltage conditions an input/output (“I/O”) buffer having first and second I/O transistors. The first I/O transistor is coupled to a first over-voltage protection circuit adapted to prevent a... | 05/03/2011 |
| 7898321 | Driver circuit A driver is provided. The driver generally comprises a current source, a current mirror, an amplifier and a presetting circuit. The current source is generally adapted to provide a reference current to the current mirror. The transistor is coupled to the current mir... | 03/01/2011 |
| 7893756 | Precision current source A device for providing a precision current includes a first operational amplifier and multiple path transistors. The first operational amplifier outputs a gate voltage based on reference voltage and input voltages. The path transistors have corresponding gates for r... | 02/22/2011 |
| 7888993 | Bias current generator for multiple supply voltage circuit An electronic device supplied by multiple supply voltages includes a bias current generating stage and maximum current selection stage. The bias current generating stage comprises a crude bias current generator for generating an crude bias current during a power up ... | 02/15/2011 |
| 7863970 | Current source device A current source device having a plurality of current output circuits each including a current output FET, first and second switch FETs respectively series-connected to source and drain sides of the current output FET to form a series circuit, a source voltage suppl... | 01/04/2011 |
| 7852144 | Current reference system and method A relatively precise and accurate current reference system and method are described. The present current reference system and method facilitate realization of relatively high accuracy and precision in current references independent of process, voltage and temperatur... | 12/14/2010 |
| 7847624 | Internal power supply circuit A disclosed invention is an internal power supply circuit, which generates an internal power supply from a first power supply. The circuit comprises a first internal step-down power supply generation unit, which generates a first internal step-down power supply from... | 12/07/2010 |
| 7830202 | Current mirror circuit The present invention discloses a current mirror circuit generating an output current flowing through an output current path according to an input current flowing through an input current path. The current mirror circuit comprises a P type transistor in the output c... | 11/09/2010 |
| 7825720 | Circuit for a low power mode A circuit has a first transistor having a first current electrode coupled to a first supply voltage terminal and a second current electrode coupled to a virtual supply voltage node. A second transistor has a first current electrode coupled to the first supply voltag... | 11/02/2010 |
| 7808309 | Current source circuit A current source circuit is provided. The circuit includes a first transistor and at least one second transistor. A first source/drain terminal of the first transistor is coupled to a bias voltage. A second source/drain terminal of the first transistor is used to re... | 10/05/2010 |
| 7795954 | Device for providing substantially constant current in response to varying voltage A device for providing a substantially constant current includes first and second current mirrors. The first current mirror receives a first amount of a first bias current and provides an output current based on the first amount of the first bias current, the first ... | 09/14/2010 |
| 7782123 | Semiconductor integrated circuit A semiconductor integrated circuit provided with: a transistor M7 with a control terminal supplied with a second voltage GND, a first terminal connected to a third node N3, and second terminal connected to a fourth node N4 for introducing curren... | 08/24/2010 |
| 7777561 | Robust current mirror with improved input voltage headroom An apparatus comprising an input current source device, a first transistor, a second transistor and a level shifter device. The input current source device may provide a input current source. The first transistor may be configured to operate in saturation for mirror... | 08/17/2010 |
| 7764115 | System and method for providing a high input common mode current conveyor A system and method is disclosed for providing an improved current conveyor circuit in a mobile pixel link (MPL) receiver that can provide an increased input common mode voltage to allow a greater tolerance of noise on a transmission line. The current conveyor circu... | 07/27/2010 |
| 7728655 | Current limiting load switch with dynamically generated tracking reference voltage A current limiting load switch for bridging supply Vss and load with a reference voltage VRdt dynamically generated by a VRdt-generator is proposed. It includes: A pair of power FET and sense FET interconnected in split-current configuration. T... | 06/01/2010 |
| 7728654 | Current generator A current generator, including a chopper stabilization operational amplifier, a transistor, and an impedance unit is provided. The chopper stabilization operational amplifier includes a first input terminal, a second input terminal, and an output terminal. The trans... | 06/01/2010 |
| 7724077 | Stacked cascode current source Apparatus are provided for a stacked cascode current source. An apparatus is provided for an electrical device comprising an input node and an output node. A first transistor stack is coupled to the input node. The first transistor stack includes a first transistor ... | 05/25/2010 |
| 7705663 | Semiconductor integrated circuit A semiconductor integrated circuit, has a current source having one end connected to a power supply and outputting a reference current; a first MOS transistor having one end connected to an other end of the current source and being diode-connected; a second MOS tran... | 04/27/2010 |
| 7705664 | Current mirror circuit having drain-source voltage clamp A circuit and method for providing an output current that includes biasing an output transistor in accordance with a reference current to conduct the output current and further includes maintaining a voltage across the output transistor. One embodiment includes cond... | 04/27/2010 |
| 7675355 | Semiconductor device that degrades leak current of a transistor A semiconductor device, has a main transistor that is a first-conductivity-type MOS transistor and has the drain connected to a first potential; a first switch circuit that is connected between the source of said main transistor and a second potential; a dummy trans... | 03/09/2010 |
| 7646235 | Programmable current generator, current generation method and transmitter arrangement A programmable current generator includes a decoder unit to generate a first and a second set of control signals as a function of a current control word. The current generator further includes a first and a second array of current sources, wherein the current source... | 01/12/2010 |
| 7642842 | System and method for providing communication of over-current protection and current mode control between multiple chips in an integrated circuit A system and method is disclosed for providing communication of an over-current protection signal and current mode control signals between a controller chip and a power chip in an integrated circuit device that comprises a plurality of integrated circuit chips. The ... | 01/05/2010 |
| 7642843 | Reference voltage generating circuit and semiconductor integrated circuit device A reference voltage generating circuit comprises: a monitor circuit, including a low threshold voltage PMOS transistor, a low threshold voltage NMOS transistor, and a resistor having a predetermined resistance which are connected in series, for generating a referenc... | 01/05/2010 |
| 7629835 | Bias circuit A gm compensation current source controls current that runs through a current source transistor, source-grounded transistors that determine a gain so that mutual conductance gm of the source-grounded transistors is compensated and the gain is compensated. A 1/r curr... | 12/08/2009 |
| 7629834 | Limiter circuit A limiter circuit includes a differential amplifier circuit having a non-inverting and an inverting inputs, the inverting input fed with an input signal to the limiter circuit, a driving circuit fed with an output of the differential amplifier, a MOS transistor havi... | 12/08/2009 |
| 7573325 | CMOS reference current source A CMOS reference current source comprises two circuit branches connected in parallel between supply terminals. The first circuit branch includes a series connection of a bias current source (MP1) and a first MOS transistor (MN1) of a first conductivity... | 08/11/2009 |
| 7551021 | Low-leakage current sources and active circuits A low-leakage circuit includes first, second, and third transistors, which may be P-channel or N-channel FETs. The first transistor provides an output current when enabled and presents low leakage current when disabled. The second transistor enables or disables the ... | 06/23/2009 |
| 7538602 | Semiconductor integrated circuit with stepped-down voltage generating circuit A semiconductor integrated circuit includes a voltage generating circuit configured to generate a predetermined voltage, an NMOS transistor configured to receive at a gate node thereof the predetermined voltage generated by the voltage generating circuit, to receive... | 05/26/2009 |
| 7535286 | Constant current source apparatus including two series depletion-type MOS transistors In a constant current source apparatus for supplying a load current to at least one load, first and second output terminals are provided, and at least one of the first and second output terminals is capable of being connected to the load. First and second depletion-... | 05/19/2009 |
| 7528648 | Replica biased system An apparatus, method and system are described for providing a low power replica biased regulated supply voltage without the size requirements of using a large resistor coupled between the source of a master transistor and ground. Instead, a source of a replica trans... | 05/05/2009 |
