摘要:
The present invention relates to a power-on-reset (POR) circuit (100) that generates an absolute power-on-reset trip point voltage. The POR circuit (100) comprises of a power supply independent module (10), a power supply dependent module (20), a first tuning module (30), a second tuning module (40), an inverter module (50), a voltage comparison module (60) and a feedback module (70).
摘要:
A wireless device includes a supply independent bias circuit such as a bandgap current generator or a Proportional-To-Absolute-Temperature (PTAT) current generator. A start-up circuit that includes an amplifier and a Schmidt trigger to provide the desired start-up that avoids regulation to an undesired state.
摘要:
An auto-grounding circuit responsive to a reset signal (PORL) discharges an input terminal (11) of an integrated circuit and its associated input line (13) to ground, using a pull-down transistor (17) coupled to the input line, with a gate of the pull-down transistor coupled to receive the reset signal. An exemplary circuit also includes a NAND gate (25) and a second pull-down transistor (27) to maintain an established voltage level of the input line after the reset signal is no longer asserted until the input terminal is driven by an applied input signal. The voltage maintaining circuitry is weaker than the main pull-down transistor to avoid interfering with normal operation of the input terminal.
摘要:
A programmable system-on-a-chip integrated circuit device comprises a programmable logic block, a non-volatile memory block, an analog sub-system, an analog input/output circuit block, and a digital input/output circuit block. A programmable interconnect architecture includes programmable elements and interconnect conductors. Ones of the programmable elements are coupled to the programmable logic block, the nonvolatile memory block, the analog sub-system, the analog input/output circuit block, the digital input/output circuit block, and to the interconnect conductors, such that inputs and outputs of the programmable logic block, the non-volatile memory block, the analog subsystem, the analog input/output circuit block, and the digital input/output circuit block can be programmably coupled to one another.
摘要:
A transient detection circuit (405) which may be used in an electrostatic discharge (ESD) clamp circuit. The transient detection circuit includes a filter circuit and an inverter circuit (408). The voltage switch point of the inverter circuit has a constant voltage offset from one of the nodes. When a filtered voltage level from the filter circuit crosses the voltage switch point of the inverter circuit (indicative of an ESD event), the inverter circuit provides a signal indicating an ESD event.
摘要:
A voltage detecting circuit is provided with a first MOS transistor the gate and drain of which are connected to a first node, a second MOS transistor the gate and drain of which are respectively connected to the first node and a third node, a first resistor connected between the first node and a second node, a second resistor connected between the second node and a ground voltage terminal, a first NOT circuit the input terminal of which is connected to the second node, the output terminal of which is a fourth node and which is connected between the third node and the ground voltage terminal, and a second NOT circuit the input terminal of which is connected to the fourth node, and the output terminal of which is a fifth node. The circuit stably detects a voltage without consuming much electric power.