Abstract: A voltage regulation circuit that receives power at an unregulated voltage and supplies power at a regulated voltage to an external circuit. The regulation circuit includes two modules each including a regulator, controlled by a common control, the modules supplying power to the external circuit in tandem. Each module includes a switch and control circuitry that cuts it off from the external circuit if its voltage is outside of a selected range.

Abstract: Disclosed is an electrical power system adapted to receiving power from a source of alternating current, typically a small alternator, and supplying a direct current potential to a load. This power system includes two stages, the first stage comprising switchable rectifying devices such as silicon controlled rectifiers which interact with the impedance of the alternator or other source of alternating current power as a switching regulator to create an intermediate direct current potential.The second stage operates from this intermediate direct current potential to produce a slightly lower output voltage, and creates a more accurate regulation than is possible with the first stage alone, the second stage greatly reduces ripple and high frequency noise components contained on the output of the first regulator stage. The second stage serves as an active low pass filter tuned to a desired DC voltage.

Abstract: Apparatus adjusts the low supply voltage applied to the bipolar gate array circuits of a semiconductor chip to provide uniform propagation delay in the signals operated on by the array circuits notwithstanding variations in manufacturing tolerances and temperature variations. The apparatus includes a voltage regulator circuit and a first resistor located off the chip connected between its output and adjustment terminals and a second resistor located on the chip connected to the adjustment terminal of the regulator circuit. The voltage regulator circuit in response to changes in the resistance of the second resistor adjusts the low supply voltage at its output terminal so as to provide uniform signal delays through the array circuits.

Abstract: An electronic control system for a high power load is provided with a plurality of parallel current paths divided into two groups (11-12), with control devices (Q.sub.1 -Q.sub.n) in the current paths of one group each having a current limiting resistor (13), and control devices (Q.sub.21, Q.sub.22) in the current paths of the other group each having no current limiting resistor, so that when the control devices of the second group are turned fully on, a short circuit is achieved by the arrangement of parallel current paths. Separate but coordinated control signals (1, 2) are provided by suitable means (P.sub.1 -P.sub.3) to first turn on the control devices of the first group and increase their conduction toward saturation as a function of control input, and when fully on, or shortly before, to turn on the control devices of the second group and increase their conduction toward saturation as a function of the control input as that input continues to increase.

Abstract: A circuit, for controlling the output level of a load circuit connected thereto, has a single input for receiving a control signal to provide both a selectable level on/off output signal at a first output connected to an on/off terminal of the load circuit, and a pair of essentially equal control currents drawn in shunt from a pair of output terminals connected to load output-level-setting input terminals. The shunt control currents are provided by a current-mirror circuit having a pair of substantially identical current sinks, each responsive to an input signal applied thereto in parallel from the single control circuit input.

Abstract: A transistorized circuit is used for controlling the flow of current through a high voltage source, such as a battery. The high voltage source must be capable of being tapped at voltages less than the critical voltage of the transistors in the circuit, that is, that voltage at the maximum current through the transistor, above which the breakdown characteristics or maximum power dissipation ability of the transistor is exceeded. A plurality of transistor arrays are connected in series with each other, and each array is connected to a tap on the voltage source. Each array includes parallel connected transistors in sufficient quantity to achieve the desired current flow. The current through each array is made equal by control circuits so that no current flows through the tapped connection to the voltage source. The transistorized circuit may be used to control both the charging and the discharging rate of current through a high voltage battery.

Abstract: This current controlling circuitry is arranged to monitor and control the operation of transistor circuitry for the development of a highly accurate and stable reference electric level potential and/or current for distribution to a plurality of logical circuits on a semiconductor chip having of the order of a thousand such circuits thereon. A first order reference potential is developed by a current-source reference circuit and applied to a transistor operational amplifying circuit having current control circuitry connected in the biasing subcircuitry of that transistor amplifying circuit. This control circuitry essentially monitors the output of an amplifying circuit and adjusts feedback potential to an emitter bias supplying current source transistor for that amplifying circuit.