摘要:
An integrated RF switch module including a package customized to include at least one trace. The trace includes one or more of at least one connection pad and at least one landing pad. At least one switching die is connected to the at least one connection pad. At least one device is connected to the at least one landing pad, the at least one device configured to enhance the performance of the switching die.
摘要:
A wideband bandpass filter includes an RF input terminal, an RF output terminal, a plurality of electrically tunable coupling capacitors coupled in series between the RF input and output terminals, and a plurality of resonating circuits each including an electrically tunable resonator capacitor coupled to one of the coupling capacitors. At least one resistance is coupled in series between at least one of the coupling capacitors for providing enhanced out of band rejection of the filter.
摘要:
An internally, resistively, sensed Darlington amplifier includes a Darlington amplifier, at least an input transistor, an output transistor, a resistive divider, a signal input node, and a signal output node. The Darlington amplifier is responsive to an input signal and configured to generate an output signal. An internal bias setting resistor is coupled between the signal output node, a collector of the output transistor, and the resistive divider. The bias setting resistor is configured to set and regulate the bias current of the Darlington amplifier.
摘要:
A dynamic, self adjusting synchronization system for real time control of the frequency and bandwidth of a modulated signal includes a voltage controlled oscillator for generating a carrier signal to be modulated having a predetermined frequency and bandwidth. There is an adjustment device having a center frequency adjustment circuit for providing a voltage level to the voltage controlled oscillator. A modulation generator generates a modulation signal for modulating the carrier signal to produce a modulated carrier signal and a co-generated measurement signal synchronized with the modulation signal. There is a device for selectively inhibiting the modulation signal. A measurement device includes a counter device to selectively count the pulses of the modulated carrier signal for a first predetermined period of time and counting the pulses of the carrier signal for a second predetermined period of time while the modulation signal is inhibited and a measurement circuit, responsive to the co-generated measurement signal, to synchronously define the first predetermined period of time during which the modulated carrier pulses are counted and is responsive to a timing signal to define the second predetermined period of time during which the modulation signal is inhibited for counting the carrier pulses. The adjustment device is responsive to the measurement device, for varying the voltage applied to the voltage controlled oscillator to maintain the predetermined frequency of the carrier signal, and is responsive to the measurement device for varying the voltage applied to the voltage controlled oscillator to maintain the predetermined bandwidth of the modulated carrier signal.
摘要:
A power FET includes a substrate of semi-insulating material having a top side and a ground side; an FET fabricated on the ground side of the substrate; and conductor means in the substrate extending from the drain electrode and the gate electrode on the ground side to the top side of the substrate. A ground plane on the ground side of the substrate contacts the source electrode of the FET and is spaced from the gate and drain electrodes to form a dome for minimizing ground inductance and maximizing heat transfer from the FET independent of the thickness of the substrate.
摘要:
A cascaded low pass/high pass filter phase shifter system including: a series of semiconductor switches each having a control electrode and first and second load electrodes; a capacitance connected in series between each control electrode and ground; an inductance connected in series between each second load electrode of one semiconductor switch and the first load electrode of the adjacent semiconductor switch in the series; and means for selectively applying a control signal to each said control electrode for switching the associated semiconductor switch between a first state in which it operates as a low pass filter and a second state in which it operates as a high pass filter to introduce a phase shift in a propagated signal.
摘要:
An edge launch and fabrication method wherein spaced elongated slots are formed through a circuit board. The slots are plated at least along one side thereof connecting ground planes of the circuit board thus forming spaced edge plated regions. Circuit modules are produced by singulating the circuit board along a cut line offset outwardly from the plated slot sides to form an edge launch outwardly extending from and between the spaced edge plated regions.
摘要:
A voltage controlled oscillator including an RF output terminal and a DC control terminal, an active circuit, and a resonant circuit interconnected with the active circuit and including a plurality of series resonators each having an electrically variable capacitance and fixed inductor; the active circuit includes at least one transistor having an operating current density which is approximately 35% or less of the peak fT operating current density and/or the active circuit includes a multi-transistor bank disposed in at least two separate sections, each pair of sections spaced apart to provide improved thermal uniformity among the transistors without substantially increasing parasitic impedance among them for providing an improved lower phase noise output at said RF output terminal.
摘要:
An analog-to-digital-converter includes an input signal connector, an output signal port, two or more sub-ADCs, and a digital signal processing block. The result from each sub-ADC is used by the digital signal processing block to output data with increased performance.