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| Number | Title | Issue Date |
| 7271629 | Buffer circuit having electrostatic discharge protection The buffer circuit includes pull up and pull down circuits configured to selectively pull up and pull down, respectively, a voltage of an put/output pad. The pull up and pull down circuits are connected to separate power supply lines such that a current path from th... | 09/18/2007 |
| 7157962 | Charge pump output device with leakage cancellation The charge pump circuit includes: a charge pump output branch; a current leakage device coupled to the output branch; and a feedback device coupled between the output branch and a control node of the current leakage device such that the leakage device cancels leakag... | 01/02/2007 |
| 7034598 | Switching point detection circuit and semiconductor device using the same A switching point detection circuit for detecting a switching point according to a fabrication condition of a MOS transistor includes a reference voltage generation circuit for generating a reference voltage, a first CMOS inverter circuit for receiving the reference... | 04/25/2006 |
| 7026859 | Control circuit for delay locked loop Provided is directed to a delay locked loop control circuit capable of reducing a test time and preventing a yield from being reduced, by preventing a failure due to a charge sharing and a failure in a specific frequency and voltage due to a noise of a feedback cloc... | 04/11/2006 |
| 6566933 | Switched capacitor transmitter pre-driver A transmitter pre-driver utilizing discrete-time charge sharing between multiple capacitors to create intermediate voltages. The intermediate voltages are fed into an output driver to produce Class AB and Class A output current flow.... | 05/20/2003 |
| 6492860 | Low voltage CMOS analog switch A low voltage analog switch having low leakage off-current and including a first transmission gate having a first N-channel transistor and a first P-channel transistor, each first and second transistor having respective drain and source terminals coupled ... | 12/10/2002 |
| 6429731 | CMOS voltage divider A CMOS voltage divider having a first chain containing series-connected MOS transistors of a first conductivity type is described. Each of the MOS transistors have identical geometrical dimensions and, at the same time, each have identical gate-source vol... | 08/06/2002 |
| 6285247 | Optimized low voltage CMOS operation Operation of CMOS integrated circuits at a reduced voltage are optimized. A digital system comprises a plurality of P-channel metal oxide field effect transistors and a plurality of N-channel metal oxide field effect transistors arranged in complementary ... | 09/04/2001 |
| 5990523 | Circuit structure which avoids latchup effect A circuit structure which avoids a latchup effect. An N-well is formed in a P-type substrate. An N-type contact is formed in the N-well. A PMOS is located on the N-well. A gate of the PMOS connects to an input terminal and a source region of the PMOS conn... | 11/23/1999 |
| 5736876 | Circuit for the detection of voltage thresholds A circuit to detect the crossing of at least one voltage threshold by an input voltage of an integrated circuit has two arms mounted in negative feedback configuration, each comprising a forward biased diode in series with a current generator. The current... | 04/07/1998 |
| 5602500 | Circuit for the detection of voltage thresholds A circuit to detect the crossing of at least one voltage threshold by an input voltage of an integrated circuit has two arms mounted in negative feedback configuration, each comprising a forward biased diode in series with a current generator. The current... | 02/11/1997 |
| 5589792 | Resistor programmable temperature switch A resistor programmable temperature switch for indicating that a preselected trip temperature has been reached includes first and second bipolar trasistors of like polarity having a fixed ratio of emitter areas; means for connecting the emitters of the fi... | 12/31/1996 |
| 5585749 | High current driver providing battery overload protection A high current driver (100) for driving a high current load (110) in an electronic device powered by a battery (112) comprises a voltage reference (104) for generating a reference voltage, and a drive current controller (102, 302) responsive to a drive co... | 12/17/1996 |
| 5563547 | Single switch PTO enabler An electronic circuit for providing a momentary switch closure function output in response to operation of a control-request switch input to a closed condition and maintenance of the control-request switch input in closed condition for an amount of time g... | 10/08/1996 |
| 5552741 | High impedance common-emitter amplifier stage A high input impedance common-emitter amplifier stage is disclosed. This amplifier stage utilizes a transistor to buffer the base drive from the input stage of a Darlington circuit. This buffer action increases the input impedance of the common-emitter st... | 09/03/1996 |
| 5546043 | Circuit arrangement for driving an MOS field-effect transistor In order to drive an MOS field-effect transistor as a voltage interrupter in a DC/DC converter operating on the chopper principle, a suitable circuit arrangement has an input transistor (T1) for current control on the input side with a low voltage change,... | 08/13/1996 |
| 5545918 | Circuit construction for controlling saturation of a transistor An integrated circuit including a semiconductor substrate, a semiconductor layer formed on the substrate, a desired bipolar transistor formed in the semiconductor layer. First and second parasitic elements are formed in the integrated circuit. An element ... | 08/13/1996 |
| 5539352 | Low power voltage input circuit with high noise immunity and fast operating time A voltage input circuit for providing an output in response to an input signal. According to a preferred embodiment of the invention, an output having a first state and a second state is generated. The output is switched from the first state to the second... | 07/23/1996 |
| 5491437 | Amplifier circuit and method An amplifier circuit (10) is provided. Amplifier (10) has an amplifier stage (14) that is coupled to control an output stage (18). Output stage (18) includes a sourcing circuit (20) and a sinking circuit (22). Output stage (18) also includes a mirror circ... | 02/13/1996 |
| 5455533 | Transducer circuit with adjustable output impedance An impedance converter includes an emitter follower constructed of a first transistor with a first resistor connected between an emitter electrode of the first transistor and an output terminal. Input to the emitter follower is provided by a second transi... | 10/03/1995 |
| 5450520 | Load current sampling technique A circuit for sensing the current delivered to a load, or multiple loads, such presented by a polyphase DC motor, without significantly dissipating the energy delivered to the load, has a predriver circuit and a power delivery circuit for each load. The p... | 09/12/1995 |
| 5218236 | Output circuit having an integrated circuit with a plurality of output transistors connected to an external elements An output circuit which is provided with an integrated circuit composed of a PNP transistor and an NPN transistor of which the base is connected to the collector of the PNP transistor, a voltage source for supplying an electric potential to the emitter of... | 06/08/1993 |
| 5144169 | Operational amplifier circuit An operational amplifier circuit comprises a pair of emitter common transistors forming a differential amplifier circuit including a first conductivity type first and second transistors; a current mirror circuit including a second conductivity type third ... | 09/01/1992 |
| 5128553 | Lateral PNP turn-off drive circuit An integrated circuit is provided which uses a single drive signal for turning a PNP switching transistor "on" and "off." An NPN transistor provides reverse drive current to the PNP transistor's base. When the drive signal is present, the PNP switching tr... | 07/07/1992 |
| 5070255 | Multi-level selecting circuit A multi-level selecting circuit has a selecting section provided in a semiconductor chip by a CMOS process for selecting one of a plurality of input levels at a time, input terminals provided on the semiconductor chip for feeding a plurality of levels to ... | 12/03/1991 |
| 5055903 | Circuit for reducing the latch-up sensitivity of a CMOS circuit A circuit for reducing the latch-up sensitivity in complementary MOS technology includes a semiconductor substrate of a second conduction type. A first MOS transistor of a first complementary conduction type is disposed in the semiconductor substrate and ... | 10/08/1991 |
| 5003198 | Circuit technique for biasing complementary Darlington emitter follower stages A circuit technique for biasing a complementary NPN-PNP Darlington Emitter Follower Stage without additional biasing resistors or current sources. Four diode-connected transistor are connected in series to provide biasing across the Darlington. Two transi... | 03/26/1991 |
| 4994694 | Complementary composite PNP transistor A complementary composite PNP transistor includes a p-channel JFET and an operational amplifier coupled to form an ideal PNP transistor. The positive input of the operational amplifier forms the base of the composite transistor and the drain of the JFET f... | 02/19/1991 |
| 4922129 | Feed forward darlington circuit with reduced NPN reverse beta sensitivity A Darlington output stage is shown in which the saturation voltage is reduced to the level of a single common emitter output transistor. The circuit includes a lateral feed-forward transistor that bridges the driver transistor. A resistor is included to e... | 05/01/1990 |
| 4888498 | Integrated-circuit power-up pulse generator circuit A circuit for providing a "power-up" signal pulse in response to energization of an integrated circuit logic array by a power supply. The circuit is comprised of a pulse-generating circuit and of an optional pulse-delay means. The pulse-generating circuit... | 12/19/1989 |
| 4847518 | CMOS voltage divider circuits A CMOS fractional reference source or voltage divider circuit includes a string (chain) of CMOS pairs of transistors connected with their source-drain circuits in series and with ends of the string being connected across an input power (voltage) supply. T... | 07/11/1989 |
| 4847515 | Static relay and application thereof to a bipolar inverter or to a load in which a current flows in a random direction The invention relates to a transistorized static relay. This relay comprises a power amplifier stage having a first bipolar transistor of a first type (npn or pnp), whose collector is connected to the input of the relay and whose emitter is connected to the ou... | 07/11/1989 |
| 4847520 | Fast PNP transistor turn-off circuit A circuit is provided for reducing the turn-off transition time of a switching PNP transistor by providing a reverse drive current to the base of the PNP transistor after the drive current has been removed from the base. The reverse drive current is gener... | 07/11/1989 |
| 4845515 | Recording material utilizing multilayer Bi/Se film Provided is a recording material comprised of a substrate and a metallic recording layer, with the metallic recording layer comprising alternating layers of Bi and Se metal. At least five such alternating layers are used to comprise the recording layer, w... | 07/04/1989 |
| 4833344 | Low voltage bias circuit A bias circuit (FIG. 5) of the type comprising a bias transistor (T1) having a pair of resistors (R1, R2) in its collector path, the junction of these two resistors (R1 and R2) being connected to the transistor base. The base of a drive transistor (T2), o... | 05/23/1989 |
| 4823025 | Electronic circuit element with field-effect transistor operation applications of this circuit element, and substitution circuit for such an element An electronic circuit element with field-effect operation and with such characteristics that its source terminal (2) is to be connected, in the case of an N-type element (1a) to the positive, and in the case of a P-type element (1b) to the negative pole o... | 04/18/1989 |
| 4808860 | Filter circuit for a MOS-type integrated device, and an integrated device comprising such a filter circuit A circuit for a MOS-type integrated device includes two cross-coupled drain-gate transistors. In order to supply filtered voltages V'DD and V'SS which are equivalent to VDD and VSS, an N-channel first transistor has its source connected to VSS and its dra... | 02/28/1989 |
| 4798982 | Active symmetrical balance hybrid circuit The invention relates to an active symmetrical balance hybrid circuit. The hybrid circuit includes an input, an output and an in/output as well an impedance circuit per half section connected to the input and output which is connected between the in/outpu... | 01/17/1989 |
| 4791318 | MOS threshold control circuit A circuit for controlling the circuit thresholds on an MOS integrated circuit takes advantage of the fact that all MOS devices of a particular type on the same chip have nearly identical characteristics. The circuit thresholds are varied by applying a con... | 12/13/1988 |
| 4764686 | Transistor base control circuit for high frequency operation A switching control circuit for a power transistor is provided. For applying an initial negative base current for disabling of the power transistor, a capacitor is provided which stores the energy required by charging not only when the power transistor is... | 08/16/1988 |
