Miscellaneous active electrical nonlinear devices – circuits – and – Specific identifiable device – circuit – or system – With specific source of supply or bias voltage
Patent
1997-10-20
2000-06-06
Kim, Jung Ho
Miscellaneous active electrical nonlinear devices, circuits, and
Specific identifiable device, circuit, or system
With specific source of supply or bias voltage
327538, 327540, G05F 110
Patent
active
060723572
ABSTRACT:
A voltage generating circuit for a semiconductor memory cell using a complementary MOS (CMOS) circuit uses an external clock signal on behalf of an internal oscillator clock signal as an input signal for driving an electric charge pumping portion, and performs a pumping operation which actively corresponds to the external input environment. The voltage generating apparatus includes: a frequency dividing circuit which reduces a frequency when the frequency of an external clock signal is too fast, and generates a reduced frequency; a frequency doubling portion which increases a frequency when the frequency of an external clock signal is too slow, and generates an increased frequency; a switch and delay portion which receives the external clock signal and an output signal of a level sensing portion, is controlled by the output signal of the level sensing portion, transmits the external clock signal to an electric charge pumping portion, cuts off or delays a transmission of external clock signal; an electric charge pumping portion which outputs a high voltage or a bulk bias voltage; and a reference electric potential sensing portion which senses an electric potential of the output terminal of the electric charge pumping portion, and thus controls the switch and delay means. As a result, the voltage generating apparatus reduces a chip area and a power-consumption, thereby facilitating a test of the voltage generating circuit.
REFERENCES:
patent: 4409496 (1983-10-01), Baba
patent: 5337284 (1994-08-01), Cordoba et al.
patent: 5422586 (1995-06-01), Tedbrow et al.
patent: 5499183 (1996-03-01), Kobatake
patent: 5721510 (1998-02-01), Miyajima
Hyundai Electronics Industries Co,. Ltd.
Kim Jung Ho
LandOfFree
Voltage generating apparatus with a variable pumping operation does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Voltage generating apparatus with a variable pumping operation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Voltage generating apparatus with a variable pumping operation will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2216599