摘要:
A portable apparatus having a slot for inserting a PC card which includes a card unit and a fingerprint scanner unit. The PC card has a support for supporting the scanner and reducing the force transferred to the card unit and a connector for realizing correct fingerprint identification whether the card is inserted into the left or the right of the apparatus. The apparatus includes a support pivotally joins the scan unit and the card unit together or adjust the height of the scan unit.
摘要:
A current mirror circuit suitable for use as an amplifier active load having first and second MOS transistors connected in series together with third and fourth MOS transistors connected in series. The first and third transistors have common source and common gate connections, with the drain of the second transistor forming the current mirror input and the drain of the fourth transistor forming the current mirror output. Bias circuitry operates to maintain the second transistor in the triode region of operation and to maintain the fourth transistor in the saturation region of operation. The second transistor has a small geometry compared to the fourth transistor so as to enhance the transient response performance of the current mirror circuit.
摘要:
A current processing circuit having reduced charge and discharge time constant errors caused by variations in operating temperature and voltage while conveying charge and discharge currents to and from a capacitor, respectively. Instead of switching both the charge and discharge currents on and off, only the charge current is switched. The discharge current, generated and sunk by a current mirror circuit, remains on at all times. The charge current is two times the nominal discharge current. The actual discharge current is the sum of the nominal, or desired, discharge current, plus a small error current component introduced by the current mirror circuit generating the discharge current (thereby making the charge current approximately two times the actual discharge current). Alternatively, the discharge current can be switched while the charge current, generated and sourced by a current mirror circuit, remains on at all times. The discharge current is two times the nominal charge current. The actual charge current is the sum of the nominal, or desired, charge current, plus a small error current component introduced by the current mirror circuit generating the charge current (thereby making the discharge current approximately two times the actual charge current). As a result, the charging and discharging time constants of the capacitor are significantly less dependent upon operating temperature and voltage.
摘要:
Disclosed is a touch panel including an upper conductive layer; a lower conductive layer facing the upper conductive layer with an interval between the upper conductive layer; a capacitive sensing unit that detects a coordinate position by a capacitive coupling under a condition where a predetermined electric potential is applied to the upper conductive layer; and a resistive sensing unit that detects a coordinate position based on an electric potential at a position where the upper conductive layer and the lower conductive layer contact under a condition where a potential gradient is generated on either one of the upper conductive layer and the lower conductive layer.
摘要:
An attenuating antenna switch may be used to suppress increase in the scale and power consumption of an RFIC. The antenna switch has a first terminal, a second terminal, and an antenna terminal coupled to the first and second terminals and configured to be connected to an antenna. The first switch switches between a first state in which a high frequency signal is propagated between the first terminal and the antenna terminal, and a second state in which the high frequency signal is interrupted. A second switch switches between the first and second states between the second terminal and the antenna terminal. The first and second switches are controlled in a mutually exclusive manner such that only one of the two switches can be in the first state at any given time. When in the first state, each switch adjusts an attenuation amount of the high frequency signal.
摘要:
According to one embodiment, a power supply stabilizing circuit includes at least one bias voltage generation circuit and at least one voltage supply circuit. The at least one bias voltage generation circuit is configured to compare a reference voltage and a signal corresponding to a bias voltage which is generated from an unstable voltage, thereby generating the bias voltage. The at least one voltage supply circuit is disposed near a functional circuit, is connected to the functional circuit by a wiring line, and is configured to stabilize the unstable voltage, based on the bias voltage which is supplied from the at least one bias voltage generation circuit, and to supply a stabilized voltage to the functional circuit.
摘要:
Disclosed is a touch panel including an upper conductive layer; a lower conductive layer facing the upper conductive layer with an interval between the upper conductive layer; a capacitive sensing unit that detects a coordinate position by a capacitive coupling under a condition where a predetermined electric potential is applied to the upper conductive layer; and a resistive sensing unit that detects a coordinate position based on an electric potential at a position where the upper conductive layer and the lower conductive layer contact under a condition where a potential gradient is generated on either one of the upper conductive layer and the lower conductive layer.
摘要:
Certain embodiments provide an ADC includes a comparator, a binary counter and a control circuit. The comparator compares a first analog signal voltage with a first reference voltage, and compares a second analog signal voltage with a second reference voltage. The binary counter counts up the clock signal for a first period until the first reference voltage becomes equal to the first analog signal after the comparator starts to compare the first reference voltage with the first analog signal voltage, and inverts a logic level of the count output having a plurality of bits after the first period elapses. The binary counter counts up the clock signal for a second period until the second reference voltage becomes equal to a second analog signal after the comparator starts to compare the second reference voltage with the second analog signal voltage.
摘要:
An information processing system including a computer and a mobile terminal that can communicate with the computer in a predetermined area is disclosed. In the information processing system, the computer sends code to the mobile terminal, the mobile terminal encrypts user information using the code sent from the computer, and sends the encrypted user information to the computer, the computer decodes the encrypted user information sent from the mobile terminal using the code, and compares the decoded information with user information that is registered beforehand. Then, when the decoded user information is the same as the user information that is registered, the computer permits access to the computer, but when the decoded information is not the same as the user information that is registered, the computer prohibits access to the computer.
摘要:
A disclosed antenna device includes a ground section; and an element section projecting from the ground section. The length of the ground section in a direction orthogonal to a side of the ground section from which side the element section projects is less than approximately ¼ a corresponding wavelength. The ground section is configured to be disposed over and attached to a conductive section.