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5867038 |
Self-timed low power ratio-logic system having an input sensing circuit
A ratio-logic system having an input sensing device and a resetable delay device is disclosed. The input sensing device receives an input having a first logic state and a second input having a...
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5852377 |
Reset circuit for ensuring proper reset when used with decaying power supplies
An eletronic system includes a power supply providing an operating voltage, and a reset circuit. The reset circuit includes a voltage sensing circuit, coupled to the power supply, for generating a...
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5850156 |
Processor supervisory circuit and method having increased range of power-on reset signal stability
For use in a processor supervisory circuit, a power-on reset circuit, a method of producing a power-on reset ("RESET") signal and a power supply including the circuit. The circuit includes: (1) an...
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5847586 |
Enhanced power-on-reset/low voltage detection circuit
A comprehensive power-on-reset (POR) and low voltage detection circuit combines a Power Supply Voltage Level Detection (PSVLD) circuit with an Enhanced Retriggering (ER) circuit. The PSVLD circuit...
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5847587 |
Means for instantaneously detecting abnormal voltage in a micro controller
A voltage detector circuit for instantaneously detecting abnormal voltages in a micro controller includes a voltage detection circuit connected between the power supply and reset voltage ends of an...
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5844429 |
Burn-in sensing circuit
An improved burn-in sensing circuit for a semiconductor device generates a signal for indicating a start of a burn-in mode when an external voltage exceeds a predetermined level of a logic...
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5844434 |
Start-up circuit for maximum headroom CMOS devices
The invention entails a circuit that enables maximum headroom cascode biasing schemes to locally generate all the required voltage from a single reference current. This leads to a considerable die...
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5834958 |
Power on system
A supply voltage monitor for providing an indication of a supply voltage level considered safe for electronic circuit operation includes a supervisory or guard circuit that blocks the output of the...
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5831460 |
Power-on reset circuit with separate power-up and brown-out trigger levels
A power-on reset (POR) circuit including a first single-level POR, a second single-level POR, a combining circuit, and a latch. Responsive to the voltage on a voltage supply terminal, the first...
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5831347 |
Apparatus for determining if the duration of a power failure exceeded predetermined limits
In an electronic instrument subject to power line interruptions and having a standby power supply, an external timer is used to time a predetermined brief period (e.g. 15 seconds to 1 minute). If...
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5828251 |
Power-up detector circuit
An integrated circuit includes a power-up detector circuit that includes a node that is held at a charged state by a capacitor during normal operation. The voltage on the node is sensed by a...
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5825221 |
Output circuit of semiconductor device
An improved output circuit that provides an output signal having a predetermined high voltage level regardless of the voltage of a high-potential power supply is described. In one embodiment, the...
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5825220 |
Auto-clear circuit and integrated circuit including an auto-clear circuit for initialization based on a power supply voltage
An auto-clear circuit which has a switch device connected between a power supply voltage terminal and first and second nodes, and a potential division device, connected between the first node and a...
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5821788 |
Zero consumption power-on-reset
A power-on-reset (P.O.R.) circuit produces a power-on-reset (P.O.R.) signal whose an amplitude tracks the voltage on a supply node until it exceeds a certain threshold. The circuit has a first...
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5821787 |
Power-on reset circuit with well-defined reassertion voltage
A power-on reset (POR) circuit (200) asserts a POR signal when the supply voltage (V CC ) is turned on. As the supply voltage increases, the POR signal is deasserted when the supply voltage reaches...
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5818286 |
Integrated circuit device capable of making a burn-in setting and test mode setting to run a burn-in and a test mode operation
An integrated circuit device provided with (a) an auto-clear circuit for outputting an auto-clear signal in response to a supply of the power source, (2) a mode signal generating circuit for...
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5812001 |
Power-on reset circuit for resetting semiconductor integrated circuit
First and second inverter circuits each include a P channel and an N channel MOS transistor whose current paths are connected in series between a power-supply and ground. An input terminal of the...
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5809312 |
Power-on reset control circuit
A power-on reset control circuit and associated method for deactivating a global power-on-reset signal based on whether circuitry, critical to correct functionality of an electronic system...
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5804893 |
Semiconductor device with appropriate power consumption
A semiconductor device operable in a selected mode which is selected from a plurality of operation modes, a number of the operation modes being more than two. The semiconductor device includes a...
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5804995 |
Monitoring circuit for a supply voltage
The subject of the invention is a monitoring circuit for at least one supply voltage, having comparators that generate a first report signal if the supply voltage is below a predeterminable...
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5804996 |
Low-power non-resetable test mode circuit
A test mode circuit for an integrated circuit includes a high voltage detector having an input for receiving a high voltage signal, a Schmitt trigger having an input coupled to the output of the...
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5801586 |
Circuit for supplying a reference level to a differential sense amplifier in a semiconductor memory
A circuit for supplying a reference level to a differential sense amplifier in a semiconductor memory circuit, includes a first circuit for detecting an external power supply voltage, and a second...
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5801568 |
Precise delay line circuit with predetermined reset time limit
A delay line circuit is provided that precisely delays the incoming referenced clock signal by utilizing two delay cells and a sample-and-hold circuit. The circuit eliminates the need for sensing...
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5801561 |
Power-on initializing circuit
A method and apparatus for reducing contention in an integrated circuit during power-up. According to one aspect of the invention, an initialization circuit is included in an integrated circuit. In...
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5786717 |
System reset device having level controller for opportunely setting system reset status
The present invention is related to a system reset device setting the reset status of a system in response to a reset signal. The system reset device according to the present invention includes a...
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5786716 |
Signal generator for generating test mode signals
A signal generator for generating test mode signals when any voltage higher than a recommended input high voltage is applied to a predetermined input pin, and for switching from a normal mode to a...
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5783964 |
Backup battery switch with first power up control
A switching circuit for switching between a main power supply and a battery power supply only after first power up includes a switch, a first power up transfer transistor and a first power up...
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5783956 |
Semiconductor device realizing internal operation factor corresponding to an external operational factor stably regardless of fluctuation of the external operational factor
A semiconductor memory device includes a difference adjusting circuit for detecting difference in at least one of phase and frequency between an external clock signal and an internal clock signal,...
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5781051 |
Power-up detector for low power systems
A power-up reset detector circuit is described which uses the threshold voltages of NMOS and PMOS transistors to detect the power-up of integrated circuits, and uses a current mirror to track power...
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5778238 |
Power-down reset circuit
A microcontroller operates in response to application of a power supply voltage within a predetermined range of values between upper and lower limits. A power-on reset (POR) circuit generates an...
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5770959 |
Circuit for providing the power-up state of an electrical device
A restart circuit for an electronic device having a first switch, a second switch, an activation device for initiating a restarting operation of the electronic device when at least one of the first...
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5767710 |
Power-up reset signal generating circuit for an integrated circuit
A power-up reset signal generating circuit ensures proper operation of an integrated circuit upon power up by inhibiting operation, or forcing predetermined logic states, until the applied power...
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5767711 |
Level detection circuit and method
A level detection circuit for monitoring the level of a power supply voltage and producing an output signal at power on for resetting various system elements powered by the supply voltage when the...
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5760625 |
Low cost microcomputer power supply with power on reset and low voltage inhibit functionality
A low cost, less complex microcomputer power supply circuit with temperature stability and low current consumption in which a single voltage regulating element is used to provide the supply...
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5760624 |
Power-on reset circuit with hysteresis
A power-on reset (POR) circuit that initially asserts the POR signal when the supply voltage is turned on. As the supply voltage increases the POR signal is deasserted when it is determined that...
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5739708 |
Circuit configuration for generating an enable signal for a clock-controllable circuit
A circuit configuration for generating an enable signal for a clock-controlled circuit includes a device for generating a power-on reset signal. Deactivation of that signal is delayed through the...
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5734281 |
Semiconductor integrated circuit for outputting an intermediate potential
A small-sized semiconductor integrated circuit is provided in which the potential of a predetermined node can be set to an intermediate potential in a short period after a power source is turned...
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5734280 |
Semiconductor integrated circuit device having power on reset circuit
A semiconductor integrated circuit device has an internal circuit node reset signal generation circuit for inverting an output signal with a predetermined time lag immediately after application of...
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5731720 |
Semiconductor integrated circuit device capable of reducing power consumption
A semiconductor integrated circuit device is intended to prevent generation of an unnecessary leak current and hence to reduce power consumption. In the semiconductor integrated circuit device...
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5721502 |
Voltage-controlled reset for logic state initialization
A voltage divider and inverter provide a power-on-reset signal. The divider is placed between high and low power voltages, the divided voltage is the input to the inverter and the output of the...
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5714898 |
Power supply control circuit
An improved power supply control circuit capable of restricting operation of a peripheral circuit before the level of voltage is stabilized and permitting the peripheral circuit to operate after...
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5712584 |
Synchronous stress test control
The present invention ensures that the entire data path of the synchronous integrated circuit device composed of master and slave latches is initialized upon power-up in a test mode, thereby...
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5703512 |
Method and apparatus for test mode entry during power up
An integrated circuit includes test circuitry and test mode enable circuitry. During power-up, an over-voltage on a package pin of the integrated circuit can initiate a test mode. The test mode...
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5703510 |
Power on reset circuit for generating reset signal at power on
A power on reset circuit includes a transistor connected between a power supply node and a first node, a first capacitor connected between a ground node and a first node, a resistance element...
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5696461 |
Power-on reset circuit
A threshold detection circuit for generating a detection signal when a power supply voltage exceeds a predetermined threshold. The threshold detection circuit comprises a first detection stage, a...
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5696979 |
Resetting apparatus for a microcomputer
A resetting apparatus for a microcomputer has a voltage detection circuit for detecting a voltage of a main power line, a reset circuit for providing a reset signal to the microcomputer, and a...
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5694067 |
Microcontroller having a minimal number of external components
The present invention relates to a microcontroller that may be configured to operate without the accompaniment of any external components. The microcontroller can function in a proper manner from...
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5686847 |
Reduced sensitivity power-on reset circuitry
A circuit for resetting an electronic system based on voltage fluctuations in the power supply is disclosed. The circuit comprises a diode means for generating a first voltage being offset from the...
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5686848 |
Power-up/power-down reset circuit for low voltage interval
A power up, power down reset circuit formed of charge storage apparatus for receiving and storing charge from one pole of a voltage supply, a pair of complementary field effect transistors having...
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5684417 |
Data sensing apparatus of a read only memory device
A data sensing apparatus particularly useful for sensing a ROM device. The apparatus can be used with various voltage level devices because it has an adjustable load. A first load element is...
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