The high power (10-1000 W) modulated carrier of a noisy transmitter is attenuated and amplitude limited and is used to control a power oscillator which regenerates the carrier and modulations without the loss of power. The power oscillator is slaved in frequency to the amplitude limited and attenuated signal, and it follows any phase or frequency modulation present thereon. Noise components appearing on the original carrier fall outside of the information passband of the power oscillator loop an...

A continuous gate electrode overlies the channel of the CCD and is connected to a uniphase clock pulse source for operation of the CCD. Pairs of gate conductor-insulator-semiconductor regions are defined along the channel. In each pair of regions the surface potential-gate voltage characteristic of one region intersects that of the other region, such that in the OFF condition of a clock pulse the potential well at one region of each pair is deeper than that of the other region; in the ON conditi...

An improved impeller for a pump of the type wherein the impeller is sealed within a pump housing and driven by a rotating external drive magnet magnetically coupled to an impeller magnet forming a portion of the impeller.

A charge-coupled amplifier having a transistor used for transferring an electric charge between capacitors is provided with a charging means for charging the capacitor connected to an emitter of the transistor at a level of a sample-held signal voltage, and a differential signal voltage between the sample-held signal voltage and another sample-held signal voltage applied to a base is derived from a collector of the transistor with a delay of one sampling interval. So that, the charge-coupled amp...

A photo-coupled semiconductor device comprising a light-emitting semiconductor element, a light-receiving semiconductor element, and an insulation base supporting these two semiconductor elements. The insulation base has a pair of parallel surfaces and provides an optical path extending between the parallel surfaces for photo-coupling the semiconductor elements. Each of the semiconductor elements has at least two rigid electrodes extending in parallel to the parallel surfaces of the insulation b...

A very low noise input charge coupled device employing switches to provide a voltage gain in all electrodes prior to or in conjunction with the transfer of the signal(s) into, for example, a shift register so as to insure a signal amplitude well above the noise level associated with the shift register of the charge coupled device.

The invention relates to a charge-coupled device in which the charge transport takes place in the form of majority charge carriers via the bulk of a surface layer of the first conductivity type which forms a p-n junction with a substrate of the second conductivity type. The comparatively thick and high-ohmic surface layer has a comparatively thin low-ohmic buried zone of the first conductivity type which adjoins the said p-n junction. The buried zone forms a buffer layer against the depletion zo...

A charge coupled correlator device with two pairs of registers connected in parallel, each register comprising a succession of stages through which charges pass and in each stage at least one phase and output electrode. The electrodes of the second register have small dimensions compared with those of the first. The outputs of two such devices are subtracted to produce a correlation product.

A charge-coupled analogue delay line has a plurality of analogue storage locations, and a gating means, which may include charge-coupled shift register, for enabling input to and output from each of the storage locations in turn. The storage locations are formed on a semiconducting substrate and each has a diffused zener diode to act as a source of minority carriers and a priming electrode for drawing off and holding a charge of minority carriers from the zener diode. A sample-holding electrode,...

A filter apparatus for aquariums consisting of two separable units. Within a filter unit is located the water filtering means and a pump for circulating the water from the aquarium through the filter means and back to the aquarium. Mounted upon a power unit is a motor having an output shaft which at one end is provided with a magnet. The power unit and filter unit are both hung from the rim of a wall of the aquarium by means of interlocking lip structures. The units are constructed such that the...