摘要:
Provided is a low power consuming mixed mode amplifier. The power amplifier includes: a low output amplifier circuit generating a power amplified result having high efficiency in a low output mode the most frequently used; a high output amplifier circuit generating an amplified result having
摘要:
A synchronous dynamic random access memory capable of accessing data in a memory cell array therein in synchronism with a system clock from an external system such as a central processing unit (CPU). The synchronous DRAM receives an external clock and includes a plurality of memory banks each including a plurality of memory cells and operable in either an active cycle or a precharge cycle, a circuit for receiving a row address strobe signal and latching a logic level of the row address strobe signal in response to the clock, an address input circuit for receiving an externally generated address selecting one of the memory banks, and a circuit for receiving the latched logic level and the address from the address input circuit and for outputting an activation signal to the memory bank selected by the address and an inactivation signals to unselected memory banks when the latched logic level is a first logic level, so that the selected memory bank responsive to the activation signal operates in the active cycle while the unselected memory banks responsive to the inactivation signals operate in the precharge cycle.
摘要:
A method for updating a ROM BIOS includes the following steps: a step for reading an image data of a ROM BIOS which is to be updated; a step for reading a ROM BIOS image data from a ROM BIOS; a step for reading a new ROM BIOS image data from an auxiliary memory; a step for reading a new user information; a step for converting the new user information into an image data; a step for updating the new ROM BIOS image data and user information in the ROM BIOS. Since the user updates a ROM BIOS image data for oneself, the user information displayed during a POST operation can be displayed in the user's characteristic message. Therefore, the user can recognize one's computer through unique characteristics that are displayed on a monitor and easily identify one's computer among many different computers.
摘要:
A semiconductor memory device stably operates over a wide range of the power supply voltage by including a power supply voltage level detector for generating detecting signals according to predetermined levels of the power supply voltage and an oscillator for generating a frequency-controlled oscillation pulse whose frequency is changeable according to the detecting signals. Thus, a boosting ratio of a boosting circuit, the refresh period of a refresh circuit and the substrate voltage of a substrate voltage generator can be adaptively changeable according to the variation of the power supply voltage.
摘要:
A burn-in enable circuit and burn-in test method of a semiconductor memory device are disclosed. A high voltage exceeding the external power voltage by a predetermined amount is applied to at least one of a plurality of pins normally used with a connected semiconductor memory chip to initiate a burn-in test mode. The burn-in test enable circuit senses this high voltage and causes the reset operation of word lines in the chip to become disabled. This allows for a high stress voltage to be applied to all access transistors in the chip simultaneously during a burn-in test for substantially the same amount of time. Therefore, burn-in time is substantially reduced and a reliable burn-in test is obtained.
摘要:
Provided is a radio frequency (RF) amplifier. The RF amplifier includes an amplification circuit amplifying an RF signal, a bias voltage generation circuit supplying a bias voltage of the amplification circuit, and a first bias resistor connected between the amplification circuit ad the bias voltage generation circuit, and having a predetermined resistance allowing the bias voltage to be affected by the RF signal.
摘要:
Plasma processing equipment having a structure for preventing gap formation includes: a chamber inside which a plasma environment is formed; an upper electrode positioned at a upper position of the chamber; an electrostatic chuck positioned at a lower position of the electrostatic chuck, having a lower electrode and holding a wafer on a top surface thereof; a ring positioned at an outer side of the electrostatic chuck; and a gap prevention unit for isolating from the outside a space between the electrostatic chuck and the ring.
摘要:
Plasma processing equipment having a structure for preventing gap formation includes: a chamber inside which a plasma environment is formed; an upper electrode positioned at a upper position of the chamber; an electrostatic chuck positioned at a lower position of the electrostatic chuck, having a lower electrode and holding a wafer on a top surface thereof; a ring positioned at an outer side of the electrostatic chuck; and a gap prevention unit for isolating from the outside a space between the electrostatic chuck and the ring.
摘要:
A synchronous dynamic random access memory capable of accessing data in a memory cell array therein in synchronism with a system clock from an external system such as a central processing unit (CPU). The synchronous DRAM receives an external clock and includes a plurality of memory banks each including a plurality of memory cells and operable in either an active cycle or a precharge cycle, a circuit for receiving a row address strobe signal and latching a logic level of the row address strobe signal in response to the clock, an address input circuit for receiving an externally generated address selecting one of the memory banks, and a circuit for receiving the latched logic level and the address from the address input circuit and for outputting an activation signal to the memory bank selected by the address and an inactivation signals to unselected memory banks when the latched logic level is a first logic level, so that the selected memory bank responsive to the activation signal operates in the active cycle while the unselected memory banks responsive to the inactivation signals operate in the precharge cycle.
摘要:
A semiconductor memory device stably operates over a wide range of the power supply voltage by including a power supply voltage level detector for generating detecting signals according to predetermined levels of the power supply voltage and an oscillator for generating a frequency-controlled oscillation pulse whose frequency is changeable according to the detecting signals. Thus, a boosting ratio of a boosting circuit, the refresh period of a refresh circuit and the substrate voltage of a substrate voltage generator can be adaptively changeable according to the variation of the power supply voltage.