Abstract: An oscillator generates a radio frequency (RF) output signal having high phase shift versus frequency characteristics close to a desired output frequency of the oscillator. The oscillator includes a resonator having a resonant frequency that is substantially the same as the desired output frequency of the oscillator, where the resonator provides a reflected signal; a resistor connected to one port of the resonator, another port of the resonator being connected to ground; an amplifier configured to receive the reflected signal from the resonator and to output an amplified reflected signal as the RF output signal; and a circulator having a first port connected to the resonator via the resistor, a second port connected to an input of the amplifier, and a third port connected to an output of the amplifier such that the amplified reflected signal is input back to the resonator.

Abstract: An oscillator includes a resonator and a first loop circuit. The first loop circuit includes an amplifier and a first coupler. That first loop circuit is electrically coupled to the resonator. The oscillator is configured to produce negative feedback for the amplifier in a cavity mode relative to short circuit terminations or open circuit terminations of a cavity modelling the oscillator at frequencies offset from a carrier frequency. The oscillator has a loss of less than 4.00 dB for a bidirectional trip through the cavity at the frequencies offset from the carrier frequency.

Abstract: An oscillator includes a resonator and a first loop circuit. The first loop circuit includes an amplifier and a first coupler. That first loop circuit is electrically coupled to the resonator. The oscillator is configured to produce negative feedback for the amplifier in a cavity mode relative to short circuit terminations or open circuit terminations of a cavity modelling the oscillator at frequencies offset from a carrier frequency. The oscillator has a loss of less than 4.00 dB for a bidirectional trip through the cavity at the frequencies offset from the carrier frequency.

Abstract: By adding light reflective and/or transparent and/or translucent material within a micro-electronic circuit housing, improved light transfer is achieved between a light generation source and a light utilization device. In one embodiment, the reflective material is placed on the inside surface of a non-metallic housing lid and the light from the light source (typically an LED) reflects from the reflective material and impacts the device (typically an FET). In another embodiment, the LED and FET are encased in a clear (low light-loss) material (typically silicone overcoat) so as to allow the light from the LED to reflect from the top of the clear material onto the FET. If desired, an opaque encapsulant surrounds the clear material and fills out the volume within the housing.

Abstract: An integrated circuit includes a first RF port and a second RF port. A limiter section is disposed between the first RF port and the second RF port and a detector section coupled to an RF signal path between the first RF port and the second RF port configured to detect a power level of an input signal, and coupled to the limiter section.

Abstract: A dual path attenuation system includes an ALC system, a through signal path, an attenuation signal path, and a non-terminated input switch and a non-terminated output switch that alternatively couple one of the through signal path and the attenuation signal path between an input and an output. The ALC system adjusts the amplitude of an applied input signal over an adjustment range to provide an amplitude-leveled output signal. The non-terminated input switch and non-terminated output switch couple the through signal path between the input and the output when the amplitude-leveled signal has an amplitude above a designated threshold within the adjustment range, and couple the attenuation signal path between the input and the output when the amplitude-leveled signal has an amplitude that is below the designated threshold.

Abstract: In one aspect, a signal path is described. The signal path has a nominal impedance over a specified bandwidth and interconnects a port of a microwave circuit package and a microwave component mounted in the microwave circuit package. The signal path includes an inductive transition and first and second capacitive structures. The inductive transition extends from a first point on the signal path to a second point on the signal path and has an excess impedance above the nominal impedance. The first and second capacitive structures respectively shunt the first and second points on the signal path to compensate the excess impedance of the inductive transition. The inductive transition and the first and second capacitive structures approximate a filter having an impedance substantially matching the nominal impedance over the specified bandwidth.

Abstract: An integrated circuit includes a first RF port and a second RF port. A limiter section is disposed between the first RF port and the second RF port and a detector section coupled to an RF signal path between the first RF port and the second RF port configured to detect a power level of an input signal, and coupled to the limiter section.

Abstract: By adding light reflective and/or transparent and/or translucent material within a micro-electronic circuit housing, improved light transfer is achieved between a light generation source and a light utilization device. In one embodiment, the reflective material is placed on the inside surface of a non-metallic housing lid and the light from the light source (typically an LED) reflects from the reflective material and impacts the device (typically an FET). In another embodiment, the LED and FET are encased in a clear (low light-loss) material (typically silicone overcoat) so as to allow the light from the LED to reflect from the top of the clear material onto the FET. If desired, an opaque encapsulant surrounds the clear material and fills out the volume within the housing.

Abstract: In one aspect, a signal path is described. The signal path has a nominal impedance over a specified bandwidth and interconnects a port of a microwave circuit package and a microwave component mounted in the microwave circuit package. The signal path includes an inductive transition and first and second capacitive structures. The inductive transition extends from a first point on the signal path to a second point on the signal path and has an excess impedance above the nominal impedance. The first and second capacitive structures respectively shunt the first and second points on the signal path to compensate the excess impedance of the inductive transition. The inductive transition and the first and second capacitive structures approximate a filter having an impedance substantially matching the nominal impedance over the specified bandwidth.

Abstract: A temperature monitoring method and apparatus is provided in which temperature values are used to optimize temperature-dependent disc drive parameters. The present invention also can be implemented as a computer-readable program storage device which tangibly embodies a program of instructions executable by a computer system to perform a temperature monitoring method.

Abstract: A temperature monitoring method and apparatus is provided in which temperature values are used to optimize temperature-dependent disc drive parameters.

Abstract: A control for a liquid level regulating system including a casing which is immersed in the liquid to a depth at which control is to be effected, a loose flexible diaphragm closes the casing at the bottom and is moved in accordance with the liquid head. A plunger mounted in the casing for free vertical movement within a selected range has a disc-like foot positioned for free engagement by the diaphragm. An adjustable spring and stops are provided for setting the range of movement. Vertical movement of the plunger actuates a cam or screw to vary the setting of the control element of the level control system. This element may be the discharge outlet control. The control provides quick response and actuates the level control to effect accurate maintenance of the required liquid level in an air pressure control system or, for example, a variable resistance control in an electrical control system.