摘要:
An IC chip characterized in that at least two input pads and at least two output pads are respectively disposed symmetrical to each other about the center of the IC chip, at least two input/output pads are disposed symmetrical to each other about the center, at least one supply voltage pad is disposed in each of four equal sections formed by longitudinally and laterally dividing the IC chip, and at least one control voltage pad is disposed in each of these four sections. The IC chip can be connected by bonding to various types of IC packages having different configurations of the pins only by mounting in a proper direction without causing the bonding wires to bridge over the other constituent elements or to cross each other.
摘要:
A double-balanced mixer circuit which consumes less power, and is capable of operating on a low voltage power source, because an output of a first signal having a phase lag of 90.degree. from a first frequency signal and an output of a second signal having a phase lead of 90.degree. over the first frequency signal are provided by means of a first phase shifter, an output of a third signal having a phase lag of 90.degree. from a second frequency signal and an output of fourth signal having a phase lead of 90.degree. over the second frequency signal are provided by means of a second phase shifter, thereby generating a radio frequency signal by mixing the first signal and the third signal in a first dual gate circuit, and generating a radio frequency signal by mixing the second signal and the fourth signal in a second dual gate circuit.
摘要:
A communication apparatus for use in a portable telephone is disclosed which has a transmit-receive common amplifier for amplifying a transmitted signal or received signal, and a mixer for frequency-mixing the transmitted signal or the received signal with a local oscillator output, wherein connection between the mixer and an input side of the amplifier and connection between the mixer and an output side of the amplifier are made by means of respective signal-path selector switches. During reception, a deep bias is applied to an FET of the transmit-receive common amplifier to reduce current consumption, and during transmission, a shallow bias is applied to the FET of the transmit-receive common amplifier for increased output.
摘要:
A semiconductor switching device includes two FETs with different device characteristics, a common input terminal, and two output terminals. The gate width of each FET is about 400 μm, and the maximum power required for the device operation is maintained by a lager conductivity of the channel layer of one FET and by a lower conductivity of the channel layer of another FET. The device operates at frequencies of 2.4 GHz or higher without use of shunt FET.
摘要:
A semiconductor switching device includes two FETs with different device characteristics, a common input terminal, and two output terminals. A signal transmitting FET has a gate width of 500 μm and a signal receiving FET has a gate width of 400 μm. A resistor connecting a gate electrode and a control terminal of the signal transmitting FET is tightly configured to provide expanding space for the FET. Despite the reduced size, the switching device can allow a maximum power of 22.5 dBm to pass through because of the asymmetrical device design. The switching device operates at frequencies of 2.4 GHz or higher without use of shunt FET.
摘要:
With a microwave FET, an incorporated Schottky junction capacitance or PN junction capacitance is small and such a junction is weak against static electricity. However, with a microwave device, the method of connecting a protecting diode cannot be used since this method increases the parasitic capacitance and causes degradation of the high-frequency characteristics. In order to solve the above problems, a protecting element, having a first n+-type region-insulating region-second n+-type region arrangement is connected in parallel between two terminals of a protected element having a PN junction, Schottky junction, or capacitor. Since discharge can be performed between the first and second n+ regions that are adjacent each other, electrostatic energy that would reach the operating region of an FET can be attenuated without increasing the parasitic capacitance.
摘要:
A switching circuit device has a first FET and a second FET, and operates with single control terminal. The device also has a common input terminal connected to the drain or source electrode of the two FETs, a first output terminal and a second output terminal connected to the source or the drain electrode of the respective FET, a bias element applying an bias to the first output terminal, a first connection connecting the control terminal to the second FET, a second connection connecting the gate of the second FET to the ground, and a direct current isolation element placed between the two FETs.
摘要:
Since improvement measures are not taken in regard to the electrostatic breakdown voltage, electrostatic breakdown voltages, between the common input terminal IN—first control terminal Ctl-1, between the common input terminal IN—second control terminal Ctl-2, between the first control terminal Ctl-1—the first output terminal OUT1, and between the second control terminal Ctl-2—the second output terminal OUT2, where both ends of gate Schottky junctions of FETs are lead out to the exterior, are low. To solve the problem, the embodiment of the invention provides a switch circuit device, wherein protecting elements are connected by disposing two electrode pads, for connection to a single control terminal, on a chip and positioning the electrode pads near the common input terminal pad I and an output terminal pad O1 or O2. The electrostatic energies that are applied between the first output terminal OUT1—the first control terminal Ctl-1, between the common input terminal IN—the first control terminal Ctl-1, between the second output terminal OUT2—the second control terminal Ctl-2, and between the common input terminal IN—the second control terminal Ctl-2 can be respectively attenuated to the same degree and most efficiently.
摘要:
A switching circuit device has a first FET and a second FET, and operates with single control terminal. The device also has a common input terminal connected to the drain or source electrode of the two FETs, a first output terminal and a second output terminal connected to the source or the drain electrode of the respective FET, a bias element applying an bias to the first output terminal, a first connection connecting the control terminal to the second FET, a second connection connecting the gate of the second FET to the ground, and a direct current isolation element placed between the two FETs. The device is housed in a MCP6 package with six pins.
摘要:
A semiconductor switching device of mirror logic includes two FETs having a gate width of 600 &mgr;m, a common input terminal, two control terminal and two output terminals. The resistors connecting the control terminals and the gate electrodes of FETs are placed underneath a pad metal layer extending from the common input terminal. Both FETs extend into the space between the control terminals and the output terminals. The device can be housed in the same package as the device of non-mirror logic.