Abstract: A tuning circuit, as for a television receiver or video recorder, employs switchable tuning circuits including micro-electronic electro-mechanical switches for selecting the ones of an array of capacitors and/or inductors as is useful in tunable circuits. The array of capacitors and/or inductors and micro-electro-mechanical switches of the switched tuning matrix is formed on an integrated circuit or an electronic circuit substrate along with amplifiers and other electronic elements of the tuning circuit for which the switched tuning matrix is employed. The switchable capacitance and inductance matrices are well suited for use in the resonators employed in the pre-selector filters, post-selector filters and oscillators of electronic tuners, such as those employed in television receivers and video recorders.

Abstract: A multi-wavelength mode-locked dense wavelength division multiplexed (MWML-DWDM) optical transmission method and system including a MWML-DWDM optical transmitter having a multiwavelength mode-locked (MWML) laser which generates a wavelength-ordered repetitive periodic (WORP) sequence of discrete optical pulses for modulation with data carried by at least one electronic carrier. Signals from multiple telecommunications transmission interfaces are multiplexed together by a high speed electronic time domain multiplexer to form a single multiplexed high speed digital transmission stream that is encoded onto the optical pulse stream output by the MWML-DWDM optical transmitter by an optical modulator so as to provide multiple channels of information carried on a DWDM data stream over an optical fiber to a receiver where the data is received and decoded.

Abstract: A microwave signal phase shifter using a metal-insulator-semiconductor (MIS) device is provided. In one preferred embodiment, one end of the device is coupled to a port of a circulator and the opposite end is coupled to ground. When the diode is switched from a first reverse bias state to a second forward bias state, the network switches from a first reactance to a second reactance and the reflection coefficient phase angle shifts.