Showing papers on "Switched capacitor published in 1975"
Patent•
02 Sep 1975TL;DR: In this paper, a redundancy switching system for transponders of the type used in spacecraft is described, where a plurality of elements such as amplifiers are selectively connectable to a similar plurality of terminals such as input or output ports by switches.
Abstract: A redundancy switching system particularly suitable for transponders of the type used in spacecraft. A plurality of elements such as amplifiers is selectively connectable to a similar plurality of terminals such as input or output ports by switches. For each amplifier there is provided one switch and the switches are interconnected to form a closed loop. The switches may have three or four-port configuration and may be double-pole or triple-pole transfer switches, wafer switches, waveguide transfer switches or the like. In another form of the invention each element is connected to one output port by a switch and additional redundant elements are cross-connected to each other by extra switches so that failed elements can be replaced by standby elements.
19 citations
TL;DR: A novel MOS high voltage switch suitable for use in integrated circuits is described, which doubles the operational voltage capability, compared to the standard MOS transistor used in integrated integrated circuits.
Abstract: A novel MOS high voltage switch suitable for use in integrated circuits is described. The device doubles the operational voltage capability, compared to the standard MOS transistor used in integrated circuits. It uses a unique variable positive feedback which increases dramatically its saturation current and permits significant saving of the circuit area. The switch is fabricated using common Sigate technology. No additional processing steps are required.
14 citations
Patent•
08 Dec 1975
TL;DR: In this paper, a remote control transmitter utilizing single-pole, single-throw switches for connecting frequency determining capacitors and a battery in circuit with an LC oscillator is shown.
Abstract: A remote control transmitter utilizing single-pole, single-throw switches for connecting frequency determining capacitors and a battery in circuit with an LC oscillator is shown. The switches can be push-button type switches which close a pair of contacts. The battery is connected in circuit with the oscillator by a semiconductor switch which is closed by closure of any one of the push-button switches. Diodes isolate the frequency determining capacitors from each other.
11 citations
Patent•
16 Jun 1975
TL;DR: A binary divider circuit consisting of a pair of inverters connected in series and a switch-connected in series around one of the inverters was proposed in this paper, where the switches are constructed such that they are not open or closed at the same time.
Abstract: A binary divider circuit consisting of a pair of inverters connected in series and a pair of switches connected in series around one of the inverters. The switches are constructed such that they are not open or closed at the same time and a capacitor is connected from the common node between the switches and ground. A resistor is connected from the output of one of the series inverters to the input of the other inverter. The resistor is of a value such that the time constant is associated with the resistor and capacitor.
8 citations
Patent•
19 May 1975TL;DR: An integrated circuit relaxation oscillator includes a capacitor, a resistor forming a conductive path for charging the capacitor and a transistor for discharging the capacitor, and a control circuit responsive to the level of charge on the capacitor for controlling the conduction level of the transistor as mentioned in this paper.
Abstract: An integrated circuit relaxation oscillator includes a capacitor, a resistor forming a conductive path for charging the capacitor, a transistor for discharging the capacitor, and a control circuit responsive to the level of charge on the capacitor for controlling the conduction level of the transistor. The control circuit has a relatively high trip point while it is in one state and during the time that the capacitor is being charged, and a relatively low trip point while it is in a second state and during the time that the capacitor is being discharged. The control circuit is balanced, such that variations in process parameters and variations in the voltage level of the power supply do not appreciably affect the period of the oscillatory output signal.
8 citations
TL;DR: In this article, a method of reactive-current compensation, employing thyristor switching of capacitor banks, is described, which is timed to eliminate supply transients, and permits a change in compensation in each supply cycle.
Abstract: The paper describes a method of reactive-current compensation, employing thyristor switching of capacitor banks. The switching is timed to eliminate supply transients, and permits a change in compensation in each supply cycle. A brief description of the electronic circuitry required to implement the switching is given, together with results for both steady-state and transient operation of an experimental system.
5 citations
Patent•
08 Apr 1975
TL;DR: In this article, an electronic circuit is provided for operating an electric lock and the circuit is activated by switching a pre-selected combination of switches in a preselected sequence, where any number of switches may be provided and there may be more switches than switches forming the preselected combination.
Abstract: An electronic circuit is provided for operating an electric lock. The circuit is activated by switching a pre-selected combination of switches in a pre-selected sequence. Any number of switches may be provided and there may be more switches than switches forming the pre-selected combination. Furthermore, circuitry may be provided such that the circuit is only activated if each switch is switched within a pre-selected time delay of the switching of the preceding switch.
4 citations
TL;DR: In this paper, a versatile field generator is described, which is able to produce fields adjustable in amplitude and frequency up to 40 A/cm and 1 MHz within a coil volume of 36 cm3.
Abstract: Generation and fast switching of rf-rotating fields for bubble memories becomes much easier, if only one rf-switching transistor is used outside the parallel resonant circuit formed by the field coil and a capacitor. In this case pulses to the basis of that transistor are not only used to start and stop the rotation, but also to feed back the energy lost by the circuit damping. The energy to build up the field and to maintain its amplitude is delivered to the coil system by a DC source only and is returned to that, when rotation stops. A versatile field generator is described, which is able to produce fields adjustable in amplitude and frequency up to 40 A/cm and 1 MHz within a coil volume of 36 cm3.
2 citations
TL;DR: In this article, the authors studied a constant frequency triggered, thyristor equipped, bistable circuit operating in the long time regime, i.e., in the regime which establishes in the circuit after applying a very great number of trigger pulses.
Abstract: The paper deals with the study of a constant frequency triggered, thyristor equipped, bistable circuit operating in the long time regime, i.e., in the regime which establishes in the circuit after applying a very great number of trigger pulses. By considering ideal thyristors and an ideal supply expressions are deduced for the instantaneous and final voltages across the commutating capacitor, the instantaneous current through the capacitor, the instantaneous and the average current through the thyristors and the supply, the reverse biasing times of the turning off thyristors and the rate of rise of thyristor forward voltage.