摘要:
An integrated circuit device having a body bias voltage mechanism. The integrated circuit comprises a resistive structure disposed therein for selectively coupling either an external body bias voltage or a power supply voltage to biasing wells. A first pad for coupling with a first externally disposed pin can optionally be provided. The first pad is for receiving an externally applied body bias voltage. Circuitry for producing a body bias voltage can be coupled to the first pad for coupling a body bias voltage to a plurality of biasing wells disposed on the integrated circuit device. If an externally applied body bias voltage is not provided, the resistive structure automatically couples a power supply voltage to the biasing wells. The power supply voltage may be obtained internally to the integrated circuit.
摘要:
A plurality of p-wells and n-wells are formed in a front side of a bulk material, and a plurality of n layers and p layers are alternately formed within the bulk material between a back side of the bulk material and the plurality of n-wells and p-wells. The plurality of n layers are electrically isolated from one another and respectively route different potentials to selected ones of the plurality of n-wells, and likewise, the plurality of p layers are electrically isolated from one another and respectively route different potentials to selected ones of the plurality of p-wells.
摘要:
A method and system of voltage compensated integrated circuits. Operating characteristics of integrated circuitry are enhanced by application of voltage compensation.
摘要:
Structures for providing devices that include resistive paths specifically designed to provide a predetermined resistance between the bulk material of the device and a well tie contact. By providing a resistive path, an equivalent RC circuit is introduced to the device that allows the bulk material potential to track the gate potential, thereby advantageously lowering the threshold voltage as the device turns on and raising the threshold voltage as the device turns off. In addition, the introduction of the resistive path also allows the bulk material potential to be controlled and stabilize at an equilibrium potential between switching events.
摘要:
To compensate for process, activity and environmental variations in a semiconductor device, a back-bias potential tuning circuit is formed on a semiconductor die. The tuning circuit tunes a bias potential applied to the semiconductor die to maintain a predetermined ratio between a transistor on-current and a transistor off-current through at least one channel region. Then, a leakage current is measured for multiple transistors formed in the semiconductor die to determine a representative leakage of the semiconductor die. Tuning characteristics of the back-bias potential tuning circuit are then set to match the representative leakage of the semiconductor die.
摘要:
First and second semiconductor devices are separated by a field oxide on a semiconductor substrate, and a field plate is positioned over the field oxide. A leakage detector detects a field leakage current between the first and second semiconductor devices. A field plate generator tunes a potential of said field plate according to a magnitude of the field current detected by the leakage current detector. In this manner, field leakage is optimized, and total dose effects may be monitored for signs of device failure.
摘要:
Disclosed is a low threshold asymmetric MOS device having a pocket region with a graded concentration profile. The pocket region includes a relatively high dopant atom concentration (of the same conductivity type as the bulk region) abutting either the device's source or its drain along the side of the source or drain that faces the device's channel region. The pocket region's graded concentration profile provides a lower dopant concentration near the substrate surface and an increasing dopant concentration below that surface. This provides a relatively low resistance conduction path through the pocket region, while allowing the device's threshold voltage to be somewhat higher at the pocket region. The asymmetric device can also include a counter dopant region located beneath its substrate surface. This forces current to flow in the substrate but just above the region of high counter dopant concentration, where the resistance is relatively low.
摘要:
Low threshold voltage MOS devices having asymmetric halo implants are disclosed herein. An asymmetric halo implant provides a pocket region located under a device's source or drain near where the source (or drain) edge abuts the device's channel region. The pocket region has the same conductivity type as the device's bulk (albeit at a higher dopant concentration) and, of course, the opposite conductivity type as the device's source and drain. Only the source or drain, not both, have the primary pocket region. An symmetric halo device behaves like two pseudo-MOS devices in series: a "source FET" and a "drain FET." If the pocket implant is located under the source, the source FET will have a higher threshold voltage and a much shorter effective channel length than the drain FET.
摘要:
A dynamic clocked inverter latch with reduced charge leakage includes a first node biasing circuit with a P-MOSFET and an N-MOSFET totem-pole-coupled between VDD and an output node, and a second node biasing circuit with another N-MOSFET and another P-MOSFET totem-pole-coupled between the output node and VSS. The first P-MOSFET receives an input data signal and the first N-MOSFET receives a clock signal and in accordance therewith together cause the output node to charge to a charged state having a charge voltage associated therewith. The second N-MOSFET also receives the input data signal while the second P-MOSFET receives the inverse of the clock signal and in accordance therewith together cause the output node to discharge to a discharged state having a discharge voltage associated therewith. During inactive states of the clock signal, the first N-MOSFET becomes reverse-biased by the output node discharge voltage, while during inactive states of the inverse clock signal, the second P-MOSFET becomes reverse-biased by the output node charge voltage, thereby virtually eliminating charge leakage to and from the output node, respectively.
摘要:
A method and apparatus for testing circuit boards using two or a small number of probes for making resistive and radio frequency impedance measurements e.g. capacitive measurements. The combination of resistive and impedance measurements substantially reduces the number of tests required to verify the integrity of a circuit board. The impedance or capacitive "norm" values used in testing the circuit boards can be obtained by operating the system in a learning mode. Analysis of the data provides not only fault detection but also can indicate approximate fault location.