Abstract: A gated oscillator circuit for generating a sampling signal for digitally processing television signals, uses an LC oscillator to achieve, high frequency stability and reduced edge jitter. Circuitry is provided on both sides of a tank circuit in the oscillator for decoupling the tank circuit from other active circuit elements thereby enhancing the frequency stability.

Abstract: An inductive proximity switch including an oscillator circuit with a frequency resonant circuit (1) determining the frequency and with an impedance member (7) determining the amplification, this impedance member containing an impedance resonant circuit with a sensor coil (9) that can be influenced by the approach of a metallic trigger. In order to provide that the proximity switch has the same activating range for ferrous and nonferrous trigger metals, the resonant frequency (f.sub.o) of the frequency resonant circuit (1) and the critical impedance value (Z.sub.o) of the impedance member (7) are tuned, according to this invention, to the coordinates (f.sub.o,Z.sub.o) of the point of intersection (P.sub.o) of the impedance/frequency characteristics (II, III), resulting for respectively identical activating range, for an NF trigger and for an FE trigger.

Abstract: A circuit and method of operation thereof for initiating a fast rise pulse scillator in a projectile fuzing system is less susceptible to external counter measures. The oscillator circuit includes an oscillator transistor which has a step recovery diode connected to the base of the transistor. The step recovery diode is forward biased for storing charge therein and then reverse biased thereby producing an internal transient in a tank circuit, also connected to the base of the transistor, which produces a rapid buildup of oscillations.

Abstract: Initial start up conditions for an oscillator having an inductor and capacitor coupled as a frequency determining resonant circuit are established by current generators. The current levels correlate to the steady state operating levels of the oscillator. Switching elements are actuated so as to gate the oscillator into immediate steady state operation without start up transient distortion by reconfiguring the relationship of the current sources to the oscillator elements.

Abstract: An externally modulated oscillator (10), a switch amplifier connected to the output side of the oscillator (10) and an electronic switch, for instance a transistor, thyristor or triac, controllable by the oscillator (10) via the switch amplifier is shown and described, the oscillator (10) having a oscillator amplifier (15) and a feedback (16). The invention is capable of detecting ferromagnetic modulating elements through paramagnetic material, in that a second feedback (17) is provided, the second feedback (17) has two externally modulatable coils (18, 19) connected in series in opposite directions, the series circuit of the two coils (18, 19) is located in the output circuit of the oscillator amplifier (15) and the junction point of the two coils (18, 19) is connected to the input (21) of the oscillator amplifier (15).

Abstract: A monolithically integrable amplitude-controllable oscillator amplifier circuit includes a differential amplifier. The bases of first, second and third transistors are acted upon by a direct voltage. A first capacitor connects the base of the second transistor to a reference potential. A frequency-determining circuit element is connected to the base of a first transistor, the collector of the second transistor and the oscillator amplifier. The collector of the first transistor is connected directly to the emitter of the third transistor forming a cascode circuit. The collector of the third transistor is connected to a first potential. The collector of the second transistor forms an amplifier output. A first resistor is connected between the collector of the second transistor and a second potential.

Abstract: An oscillator circuit which includes a differential amplifier in combination with a negative feedback network and a positive feedback network connected to the amplifier. One of these networks determines the frequency of the generated oscillation. In order to obtain an oscillation of constant amplitude, the negative feedback network comprises a current limiter active as a controllable one-port network which is connected between the negative feedback input of the differential amplifier and a fixed potential.

Abstract: An oscillator of balanced design in which a resonant impedance network is connected between the control ports of two matched transistors, and a capacitance is connected in parallel, across the two inputs of these transistors. The inputs of the transistors are connected each to a matched current source. The signals at the transistor outputs are summed together at a common node. Signals of resonant frequency in each arm of the oscillator are equal in magnitude but opposite in phase. Signals at resonant frequency thus cancel whereas signals at the second harmonic frequency add constructively and are thus enhanced. The effect is a net frequency doubling. For high frequency operation, bipolar transistors are utilized. The current sources can be modulated and an IF mixer output derived. Signal of resonant frequency can be extracted and used for signal prescaling. In an equivalent arrangement, an inductance and resonant network replace the resonant network and capacitance just mentioned.

Abstract: An oscillator/demodulator circuit for an inductive proximity switch includes a transistor amplifier stage having an input circuit and an output circuit, a resonant circuit connected in the input circuit of the transistor amplifier stage, a device for damping the resonant circuit, a device for providing positive feedback from the output circuit to the input circuit of the transistor amplifier stage, a limiter branch connected in the input circuit of the transistor amplifier stage, a dual current mirror active in the input circuit of the transistor amplifier stage having first and second interconnected current mirrors including transistors.

Abstract: A proximity switch including a high-frequency oscillation device, including a detection coil, for generating an output signal which represents the detection of the approach of an object. A rectification device is included for rectifying and smoothing the output signal from the high-frequency oscillation device to generate an output signal. A feedback device feeds back the output signal from the rectification device to the high-frequency oscillation device. An output device generates a signal when the quantity of the feedback by the feedback device has exceeded a predetermined value. The signal generated by the output device representing the approach of the object.

Abstract: An oscillator circuit having a coil and capacitor tank circuit, a clamp resistor connected at one end to the coil and a switch coupled to the clamp resistor and coil. The switch is operative to close in response to a first input logic clamp signal and shunt the coil with an impedance that causes the oscillation to stop quickly. In response to removal of the input logic clamp signal the tank circuit starts to oscillate from a known state. Preferably the clamp resistor has a value which equalizes the tank currents for the clamped and peak unclamped states.

Abstract: A frequency divider is disclosed that includes two bipolar transistors coupled as a Darlington pair, where the base of the first transistor receives an input signal to be divided, and where the common collectors of the transistors generate an output signal having a frequency equal to one-half or other integer submultiple of the input signal. The frequency divider also includes a feedback network operable for coupling a portion of the output signal from the output side of the transistors to the input side of the transistors. Such a frequency divider can provide signal conversion gain at microwave frequencies.

Abstract: A voltage controlled oscillator circuit of a type having a tank circuit for generating oscillations which includes a means for establishing a fixed bias voltage with respect to ground at a bias end of said tank circuit, means for drawing current from an a.c. end of said tank so as to control the tank gain, and an AGC capacitor. A constant current source is coupled to the AGC capacitor for supplying it with a constant charging current. Means are provided for discharging the AGC capacitor at a voltage level determined by a ratio of resistors and a transistor emitter-base ratio.

Abstract: A switchable microwave oscillator is disclosed that includes a quenching circuit for switching, attenuating, modulating, or otherwise controlling the output amplitude of frequency-stabilized, transistor-based, microwave-frequency oscillators. The quenching circuit includes a diode that is coupled to the transistor at the same port that reactive feedback is present, and includes diode biasing means for selectively applying a bias voltage to the diode. The quenching circuit selectively diverts some of the current flowing through the transistor of the oscillator to control the output thereof.

Abstract: A DC-AC converter for igniting and supplying a low-pressure discharge lamp, e.g. an electrodeless low-pressure gas discharge lamp. The converter has two input terminals (9, 10) for connection to a d.c. voltage source. The input terminals are connected to a series arrangement controlled semiconductor switching element (12), a first coil (14) and a parallel circuit having the discharge lamp 15 in one of its branches. The control electrode and a main electrode of the controlled semiconductor switching element are connected together by means of a secondary winding (21) of a transformer (17) having a primary winding (16) that forms a part of the parallel circuit. The converter includes a starter circuit comprising a resistor (28) connected between a main electrode and the control electrode of the semiconductor switching element and a capacitor (29) coupled between the control electrode and one end of the secondary winding (21) of the transformer.

Abstract: Suppression of radiated harmonics in a single stage transistor oscillator and transmitter circuit is achieved by inserting a narrow band filter, such as a surface acoustic wave resonator (SAWR), in the oscillator signal feedback loop at the point of emissions of the harmonics.

Abstract: A voltage controlled oscillator is tuned with a network comprising two varactor diodes and two transmission lines. By selecting appropriate values of varactor capacitance and transmission line length and width the overall reactance of the network is such that, when a varactor tuning voltage is varied, the output frequency of the voltage controlled oscillator will vary in an fashion with respect to the tuning voltage. Such a voltage controlled oscillator is gain compensated and exhibits a controlled modulation sensitivity over a range of frequencies. If the required frequency range of the oscillator is known beforehand, an alternate embodiment of the invention may be employed in which one of the varactor diodes is replaced with a fixed capacitor having a suitable value for the desired frequency range.

Abstract: An ultra low voltage energized oscillator for providing a stepped-up alternating current voltage is provided. This oscillator utilizes a field effect transistor with a high impedance network including a capacitor coupling a feedback signal from a secondary output winding to a primary input winding of a transformer.

Abstract: A voltage controlled oscillator having a first feedback path and a second feedback path. The first feedback path may include a phase shift unit (13) as necessary to compensate for an inherent phase shift provided by the resonant circuit (11) used therewith. The second feedback path includes a steering network (17) that responds to an external control signal to cause the output signal to be selectively in either of two phase relations with respect to the incoming signal. The control signal can also control the magnitude of the output signal. By control of the phase relationship and the magnitude, the steering network (17) can effectively control the output frequency of the resonant circuit (11).

Abstract: An integrated voltage controllable oscillator having a transistor for oscillation is further provided with a resonance circuit externally connected to two electrodes of the transistor for oscillation and including a variable capacitance element adapted to vary a resonance frequency of the resonance circuit, and a high impedance element connected between the variable capacitance element and the ground in a circuit adapted to supply a control voltage to the variable capacitance element.

Abstract: An inductive proximity switch which consists of an oscillator with an externally controllable resonant circuit as well as of a switching amplifier controllable by the oscillator. It further has a feed or biasing circuit for the oscillator and the switching amplifier. Connected in parallel with the capacitor of the resonant circuit is a capacitor with an electronic switch, the electronic switch being responsive to the output of the switching amplifier. Thereby a simple switching hysteresis is obtained.

Abstract: A frequency converter circuit for converting a high-frequency signal into an intermediate-frequency signal includes a local oscillation with a first transistor having first, second and third terminals. A first terminal of the first transistor is grounded through a first inductance and a first capacitor, while a second capacitor is inserted between the other two terminals. A resonance circuit including variable-capacity diodes and a second inductance is connected to the second terminal through a third capacitor. The frequency converter circuit further includes a mixer formed with a second transistor having a base thereof connected to the grounded terminal of the first transistor and an emitter thereof grounded through impedances offering substantially no resistance to the intermediate-frequency signal. The emitter of this second transistor is connected to a high-frequency input terminal supplied with a high-frequency signal.

Abstract: A self-oscillating mixer is disclosed, and includes two bipolar transistors coupled as a Darlington pair, where the base of the first transistor receives an input signal, and where the common collectors of the transistors generate an output signal; and a feedback resonator operable for coupling signals at the local-oscillator frequency from the output side of the transistors to the input side of the transistors. Such a self-oscillating mixer can provide signal conversion gain at microwave frequencies.

Abstract: A low noise two port voltage controlled oscillator having a coarse tuning circuit serially connected to an inductor to form a resonant circuit. A fine tuning circuit is serially connected between the resonant circuit and the input to the amplifier. A large capacitance series silicon varactor minimizes noise at the frequency of operation while optimizing the coarse tuning range.

Abstract: Phase locked, pulsed oscillator apparatus, for example, for radar use, comprises a pulsed r.f. oscillator, a pulse repetition frequency (PRF) generator and a pulse shaping network. The PRF generator pulsed output signal of frequency, f.sub.1, is reshaped by the pulse shaping network to provide to the input gate of the r.f. oscillator a train of triggering pulses each having a very fast rise time, t.sub.r, which caues the triggering pulses to exhibit significant harmonic power near the r.f. oscillator's free running frequency, f.sub.FR. The reshaped pulses provided by the pulse shaping network gate the r.f. oscillator on and off and cause coherency of the pulsed oscillator output signal relative to the PRF generator output signal. The reshaped pulse rise time, t.sub.r, is preferably less than about 3-4, and more preferably is about two, times the oscillator output signal period, l/f.sub.FR. The peak turn on voltage, V.sub.p, of the reshaped pulses is preferably about twice the average voltage, V.sub.

Abstract: Methods and apparatus for sensing, switching and modulating relying upon apparent resonant properties of thin conductive materials are provided in accordance with the teachings of the present invention. According to the present invention, an output of an oscillating circuit is selectively varied as a function of the relationship between a coil within the oscillating circuit, a thin conductive member and the apparent resonant condition of the thin conductive member to achieve appropriate sensing, switching and modulating conditions.

Abstract: A UHF oscillator circuit includes a plurality of first leadless, or "chip", surface mounted components machine positioned on a first side of a printed circuit (PC) board and a plurality of second lead-bearing components mounted on a second side of the PC board and coupled in circuit through the PC board to the chip components in an arrangement which substantially reduces circuit fabrication costs. Comprised of a majority of automatically positioned surface mounted chip components and making use of a minimum number of lead mounted discrete components, the low Q values of the surface mounted components are compensated for by an external surface mounted feedback capacitor coupled across the collector-emitter junction of a common base transistor to provide oscillator tuning over a frequency range greater than an octave.

Abstract: A high frequency oscillator is provided by connecting two amplifier circuits in parallel where each amplifier circuit provides the other amplifier circuit with the conditions necessary for oscillation. The inherent noise present in both amplifier circuits causes the quiescent current, and in turn, the generated frequency, to change. The changes in quiescent current cause the transconductance and the load impedance of each amplifier circuit to vary, and this in turn results in opposing changes in the input susceptance of each amplifier circuit. Because the changes in input susceptance oppose each other, the changes in quiescent current also oppose each other. The net result is that frequency stability is enhanced.

Abstract: Three-terminal negative admittance networks are disclosed. The preferred networks include either a bipolar junction transistor or a field-effect transistor phase shift mechanisms are used to generate a negative admittance. Various biasing schemes for proper operations of the network are also explained.

Abstract: A resonant circuit which includes the input capacitance of the clock pulse inputs of a shift register (10) is pulsed by a sinusoidal wave at voltage peaks of the wave by an oscillator delivering barely enough energy to overcome the damping of the resonant circuit. The oscillator may be crystal controlled and, instead of having a single ended output for delivering energy only on peaks of one polarity, may be in push-pull form reinforcing oscillation peaks of both polarities. This circuit is easily combined with arrangements for switching oscillator frequency from one value to another and/or arrangements for interrupting the clock pulse output for timed intervals after each loading or unloading of the shift register. The loss power dissipation is reduced to about 6% of the loss power dissipation of a square pulse drive for the clocking of the same shift register.

Abstract: A power supply with automatic arcing control and overload protection includes an electronic switch in an oscillator circuit with a primary winding of a step-up transformer. A high voltage, secondary winding of the transformer is loosely magnetically coupled to the primary winding. The frequency of oscillation of the oscillator circuit decreases as a load impedance across the secondary winding of the transformer decreases. In the case of arcing or shorting of an output circuit of the power supply the frequency of oscillation decreases below a pass band of the output circuit, thereby reducing the output current of the power supply.

Abstract: Disclosed is a proximity switch which includes a current feedback time oscillator so that an object in proximity may be detected from the decline in the oscillation output. In order to increase the recovery speed of the oscillation which has dropped as a result of detecting an approaching object, in addition to a first comparison circuit for detecting the object from the oscillation output level, a second comparison circuit is provided for varying the feedback current to the oscillation circuit to the end of maintaining the oscillation level at a certain low level even when the object has come sufficiently close to the proximity switch to otherwise completely terminate the oscillation. By virtue of the increased response speed of the proximity switch, it may be used in an environment where a strong AC magnetic field is present.

Abstract: A voltage controlled oscillator having an electrical means of frequency control which is able to operate from a supply voltage which is lower than is desirable to use with a "VARICAP" diode. The oscillator comprises a pair of transistors whose base and collector electrodes are connected together, the base electrodes being connected to a supply rail and the collector electrodes are connected to a tunable parallel LC resonant circuit. A frequency determining device, e.g. a crystal, is connected between a tapping of the resonant circuit and the emitter of one of the transistors to form a first feedback path. The crystal together with an integratable small value capacitor connected between the emitters of the two transistors form a second feedback path. The phase shifts due to the first and second feedback paths are summed vectorially at the collectors of the two transistors. By varying the gain of each of the two transistors then the resultant phase shift, and thereby the frequency of oscillation, are varied.

Abstract: A balanced LC oscillator for providing differential oscillator output signals includes a pair of transistors the emitters of which are connected to a voltage reference source that provides a fixed voltage thereto. The base electrodes of each transistor is cross coupled to the collector of the other transistor. The LC tank circuit is connected between the collectors of the two transistors and current supply is provided thereto. Although the potential at the bases of the two transistors vary with respect to the oscillator signal appearing thereat, the emitters are held at a fixed potential to eliminate any common mode signal that may otherwise be generated if the potential at the emitters was permitted to vary.

Abstract: A simplified current-tuned bipolar junction transistor oscillator is provided that is especially adapted for low power applications. The oscillator hereof utilizes the diffusion capacitance of the transistor's forward-biased base-emitter junction together with an inductance connected directly across the transistor's base-collector junction as reactive elements in the oscillator's frequency determining network. The transistor's base-collector junction is operated at zero volts bias thereby insuring that its depletion capacitance is fixed. The input current to the emitter is varied to change the base-emitter diffusion capacitance thereby adjusting the oscillator's frequency of oscillation.

Abstract: A voltage controlled oscillator (VCO) for a television tuner for tuning a large number of television channels, including signals in the microwave frequency range, the VCO comprising a printed circuit (PC) board having a dielectric substrate, a patterned metal layer on one side of the substrate, and a substantially continuous metal layer forming a ground plane on the other side of the substrate, a transistor mounted on the ground plane side of the PC board, and having emitter, base and collector leads projecting laterally from the transistor, the base of the transistor being connected to the ground plane, a d-c supply circuit connected to the transistor, a tuned circuit connected across the collector and emitter of the transistor, the tuned circuit including at least one ground connection to the ground plane of the PC board, the d-c supply circuit, the tuned circuit, and the transistor having values which produce an oscillating output at a frequency of at least one GHz, and the ground connections being interco

Abstract: An oscillator disclosed has a resonant tank circuit inclusive of an inductor (L1), a capacitor (C1), a capacitor (C3) and a capacitor (C4) connected in series with one another. A signal amplifier (A) is connected in a feedback loop which includes capacitor (C3). An additional impedance (C5) is connected between the feedback output of the amplifier and the feedback signal dividing capacitors (C3) and (C4). This additional impedance (C5) improves tuning range, tuning linearity, phase noise performance, and provides a very flat power output at ultra high frequencies.

Abstract: A proximity sensor oscillator is disclosed having controlled charge. The proximity sensor oscillator includes a resonant circuit which oscillates at a frequency determined by the components of the resonant circuit and with a power loss that is inversely related to the distance that a sensor element of the resonant circuit is to a conductive object. The peak amplitude of the resonant circuit varies with power loss and therefore measurement of this parameter provides an indication of the proximity of the conductive object to the sensor element. Power is provided to the resonant circuit by metering a fixed charge to the resonant circuit just before the peak of the resonant circuit voltage by means of a transistor switching circuit.

Abstract: An electric oscillator comprising a resonant circuit wherein, after switching on the oscillator, it takes a short time to build up to a desired amplitude of oscillation. To reduce the oscillation build-up time of the oscillator, a current supply source is provided along with control elements and switching means for changing the operating mode of the oscillator from a standby mode to an oscillatory mode, and vice versa. During the standby mode a charging current is supplied to the coil of the resonant circuit so that when switching over into the oscillatory mode, the charging current to the coil is interrupted. As a result, the control elements are immediately supplied with oscillations of the desired oscillatory amplitude.

Abstract: Disclosed is a proximity switch which includes an oscillation circuit whose oscillation output is variable depending on the inductance of a coil so that an object in proximity may be detected from the decline in the oscillation output. Further, the oscillation gain of this oscillation circuit is variable according to an input from an external source. Thus, for the purpose of increasing the recovery speed of the oscillation which has dropped as a result of detecting an approaching object, comparison circuits are provided so that upon reduction in the oscillation output of the oscillation circuit a certain signal is applied to the oscillation circuit to increase its oscillation gain. As a result, even when an object in proximity is detected and the oscillation level is maintained at a certain low level so that the oscillation may be resumed quickly when the object has moved away from the proximity switch.

Abstract: An oscillator/demodulator circuit arrangement for an inductive proximity switch with a transistor amplifier stage having an input circuit containing an attenuatable resonance circuit and having an output circuit, with a regenerative feedback from the output circuit to the input circuit of the transistor amplifier stage, the input circuit of the transistor amplifier stage having a limiter branch therein, includes a double current mirror operatively connected in the input circuit of the transistor amplifier stage and including a first and a second current mirror coupled to one another in a manner that currents supplied thereby are subtracted from one another at a circuit output, the transistors in the second current mirror having a larger emitter surface ratio in comparison with the emitter surface ratio of the transistors in the first current mirror.

Abstract: Oscillator circuit has a first and second transistors whose emitters are intercoupled and jointly connected to a variable current source, the first transistor being connected in a grounded-base connection. The oscillator current also has a parallel resonant circuit coupled to the collector of the first transistor, this collector being coupled for regenerative feedback of the circuit voltage to the base of the second transistor. Stabilization of the circuit voltage is accomplished by coupling the last-mentioned collector also to a control input of a variable current source, so that the collector current applied to the circuit is modulated in anti-phase with the circuit voltage, that is to say it instantaneously decreases at an increase of the circuit voltage and vice versa.

Abstract: A method and apparatus for generating a sweep signal, the frequency of which is accurately known at all times during the sweep cycle. The beginning and ending frequencies are fixed by a phase-locked loop and the resulting error correction voltages are stored. During the sweep, these error voltages determine the offset and slope of the D.C. voltage ramp signal which governs the frequency of the sweep oscillator.

Abstract: Energy source of a low power high frequency oscillator section driving a high power high gain amplifier section. The amplifier section includes one or more SIT's. The dc operating potential is applied to the drain electrode of one of the SIT's and is supplied to the other through a dc path from the source electrode of the one SIT to the drain electrode of the other. Operating potential from the dc biasing network between the source and gate electrode of an SIT in the amplifier section is conducted through a dc path to a transistor in the oscillator section to provide operating power for the oscillator section. The oscillator output is connected through a high frequency coupling dc blocking path to the amplifier input to provide a drive signal to be amplified and extracted at the amplifier output.

Abstract: An inductive sine wave oscillator circuit for an eddy current proximeter. The oscillator circuit includes an operational amplifier and a coil. The frequency and amplitude of the output signal produced by the circuit varies with and is controlled by the inductance of the coil. The circuit signal input to the operational amplifier undergoes a phase shift as the signal passes through the amplifier. One advantage of the oscillator circuit is that the frequency and amplitude of the output signal of the circuit for a coil having a particular inductance remains relatively stable and constant when the operating temperature of the coil varies. In addition, the coil can be fabricated from a material having a relatively high electrical resistivity.

Abstract: A low power, wide bandwidth oscillator capable of oscillating at frequencies of greater than 350 MHz and capable of being implemented in relatively few parts is disclosed. A switching section controls the resonant frequency of a resonator and is connected in DC series with an amplifier. A regulator-buffer section simultaneously serves as a voltage regulator and RF signal buffer.

Abstract: A multiband local oscillator of a television tuner comprises a common collector transistor amplifier, a capacitive feedback circuit for conditioning the amplifier to oscillate in the wide range of frequencies for VHF broadcast and cable channels and a multiband tuning circuit coupled to the base electrode of the transistor. Bandswitching signals are applied to the multiband tuning circuit to produce tuned circuit configurations for the various frequency bands. When one band is selected, the corresponding bandswitching signal is coupled to the capacitive feedback network to modify it so as to inhibit out-of-band oscillations due to parasitic elements of the tuning circuit.

Abstract: An oscillation circuit includes as its principal components a Clapp capacitor and two feedback capacitors connected to each other and a resonance coil. A first series circuit including a first variable-capacitance diode and a first DC cutoff capacitor is connected in parallel with the resonance coil, while a second series circuit including a second variable-capacitance diode and a second DC cutoff capacitor is connected to a first diode such that a certain polarity terminal of the second variable-capacitance is faced against the same polarity terminal of the first diode. One end of the second DC cutoff capacitor in the second series circuit is connected to the one of the feedback capacitors. Furthermore, means is provided at the joint of the first variable-capacitance diode and the first DC cutoff capacitor for applying a DC voltage to enable the first and second variable-capacitance diodes.

Abstract: A power source consisting of a low power high frequency oscillator section driving a high power high gain amplifier section. The amplifier section includes one or more SIT's. The dc operating potential is applied to the drain electrode of one of the SIT's and is supplied to the other through a dc path from the source electrode of the one SIT to the drain electrode of the other. Operating potential from the dc biasing network between the gate and source electrodes of an SIT in the amplifier section is conducted through a dc path to a transistor in the oscillator section to provide operating power for the oscillator section. The oscillator output is connected through a high frequency coupling dc blocking path to the amplifier input to provide a drive signal to be amplified and extracted at the amplifier output.

Abstract: A simple single-ended inverter circuit efficiently converts a DC input voltage to an AC output voltage. The circuit, which functions as a self-contained Class C oscillator, comprises an energy-storing inductor and an energy-storing tank capacitor in circuit with a saturable core feedback transformer operable to provide intermittent feedback current to effect periodic conduction of a single power transistor. When this transistor is non-conductive, resonant interchange of energy occurs between the inductor and tank capacitor; periodic energy transfer from the inductor both charges the capacitor and also supplies a load, and energy transfer from the capacitor to the inductor provides reset current to the saturable transformer.