Miscellaneous active electrical nonlinear devices – circuits – and – Specific identifiable device – circuit – or system – With specific source of supply or bias voltage
Patent
1995-12-01
1997-03-18
Tran, Toan
Miscellaneous active electrical nonlinear devices, circuits, and
Specific identifiable device, circuit, or system
With specific source of supply or bias voltage
327543, G05F 110
Patent
active
056126450
ABSTRACT:
A threshold voltage controller circuit for controlling the threshold voltage of complementary metal oxide semiconductor field effect transistors (CMOSFETs) integrated within an integrated circuit includes a test circuit, a clocked voltage comparator and voltage ramp generator. The test circuit simulates a critical signal path within the integrated circuit by receiving a first clock signal and providing in response thereto a corresponding delayed version of such clock signal. The clocked voltage comparator compares the voltage of the delayed clock signal output from the test circuit with a reference voltage and, in response to a second clock signal which is delayed with respect to the first clock signal, asserts a binary output signal high or low if the clock delay introduced by the test circuit is higher or lower, respectively, than desired. The voltage ramp generator, in response to the binary output signal from the clocked voltage comparator, generates an increasing or decreasing voltage ramp which is applied to the semiconductor substrate and well of the integrated circuit for increasing or decreasing the back bias thereto, thereby increasing or decreasing the threshold voltages of the CMOSFETs, respectively.
REFERENCES:
patent: 4435652 (1984-03-01), Stevens
patent: 4791318 (1988-12-01), Lewis et al.
patent: 5461338 (1995-10-01), Hirayama et al.
Akira Yukawa, "A CMOS 8-Bit High-speed A/D Converter IC", IEEE Journal of Solid-State Circuits, vol. SC-20, No. 3, Jun. 1985, pp. 775-779.
Sun Microsystems Inc.
Tran Toan
LandOfFree
Dynamic MOSFET threshold voltage controller does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Dynamic MOSFET threshold voltage controller, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dynamic MOSFET threshold voltage controller will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1708592