Walter E Milberger

US Patent:

44699611, Sep 4, 1984

Filed:

Jul 29, 1982

Appl. No.:

6/403214

Inventors:

Walter E. Milberger - Severna Park MD
Stephen F. Payer - Linthicum MD

Assignee:

The United States of America as represented by the Secretary of the Air
Force - Washington DC

International Classification:

H03K 301
H03K 326

US Classification:

307270

Abstract:

A dual voltage inductive coil driver is used to rapidly switch between current levels in phase shifters. This approach provides a large voltage swing during the transient period, and then provides a low-dissipation low-voltage source during the steady state condition. The dual mode uses a linear low voltage loop and a nonlinear high voltage loop in the driver. The nonlinear loop may operate from the threshold or difference between either the input reference and coil current or input reference and coil voltage.

US Patent:

46864482, Aug 11, 1987

Filed:

Aug 1, 1986

Appl. No.:

6/891822

Inventors:

Franklin B. Jones - Baltimore MD
Charles S. Kerfoot - Pasadena MD
Walter E. Milberger - Severna Park MD

Assignee:

The United States of America as represented by the Secretary of the Air
Force - Washington DC

International Classification:

G05F 170

US Classification:

323212

Abstract:

A programmable slewing power supply is used to drive microwave phase shifters according to a command signal from a system controller using: a Milberger converter; a power source; a rectifying circuit; two differential amplifier circuits; and two comparator amplifier circuits. The Milberger converter outputs a combined square wave which it produces by combining two independent square waves which add or cancel. The power source receives the combined square wave and outputs: a reference voltage, a positive voltage signal; and a negative voltage signal. The rectifying circuit produces a rectified command signal by rectifying the command signal from the system controller. The two differential amplifier circuits respectively measure the positive and negative voltage signals with respect to the reference voltage to produce a measured positive voltage signal, and a measured negative voltage signal. The comparator operational amplifiers produce complementary outputs to drive the phase shifters by respectively comparing the measured positive and negative voltage signals with the rectified command signal.

US Patent:

49394509, Jul 3, 1990

Filed:

Mar 17, 1989

Appl. No.:

7/324841

Inventors:

Walter E. Milberger - Severna Park MD
Franklin B. Jones - Catonsville MD
Charles S. Kerfoot - Pasadena MD

Assignee:

The United States of America as represented by the Secretary of the Air
Force - Washington DC

International Classification:

G01R 1922
G01R 136

US Classification:

324119

Abstract:

A high voltage pulse regulator which is capable of measuring and correcting voltage perturbations on the top of a high voltage square wave pulse is disclosed. The regulator uses: a rectifying diode, an oscilloscope, a variable zener diode, a variable biasing current source and pulse capacitor. The rectifying diode receives and rectifies the high voltage square wave pulse from a high voltage pulse source to produce a rectified square wave pulse. The rectified square wave pulse is received and regulated to a voltage level acceptable to the oscilloscope by the variable zener diode pulse capacitor, and current source, which are connected together in a parallel circuit and act as follows. The variable zener diode is activated by the biasing current. Therefore, when there is no biasing current, the pulse capacitor and rectifying diode act as a peak detector, and the high voltage square wave pulse is adjusted down within a threshold of detection by the oscilloscope, when a bias current is applied to the variable zener diode, a threshold detector is established which permits the top of the pulse to be viewed on the oscilloscope display.

US Patent:

47437855, May 10, 1988

Filed:

Mar 4, 1987

Appl. No.:

7/021852

Inventors:

Walter E. Milberger - Severna Park MD
Charles S. Kerfoot - Pasadena MD

Assignee:

Westinghouse Electric Corp. - Pittsburgh PA

International Classification:

H03K 17687
H03K 3017

US Classification:

307571

Abstract:

A high-voltage FET pulser for a synthetic aperture radar transmitter includes an FET ON switch and a tail biter switch both on the floating deck and coupled to a pulse driver circuit through a transformer having a quartz glass tube isolating the secondary winding from the core and primary winding. An active shunt regulator circuit is connected to the output of the FET ON switch to provide a flat output pulse free of ringing.

US Patent:

H3352, Sep 1, 1987

Filed:

Mar 27, 1987

Appl. No.:

7/032406

Inventors:

Walter E. Milberger - Severna Park MD
Donald C. Lewns - Severna Park MD
David E. Bulgher - Ellicott City MD

Assignee:

The United States of America as respresented by the Secretary of the Army - Washington DC

International Classification:

H02N 3335

US Classification:

363 16

Abstract:

An electrical power converter comprising two current-fed square wave chops the outputs of which are combined and rectified to yield a variable and regulated output voltage. The phase relationship of the choppers are varied to achieve output voltage control and regulation. The chopper outputs are combined in such a way that the choppers never experience the open-circuit inductance of their output transformers. This enhances frequency agility. A novel choke feed system is provided in which the choke flyback energy is absorbed and then transferred to the input of the other chopper.

US Patent:

45701296, Feb 11, 1986

Filed:

Mar 7, 1984

Appl. No.:

6/586955

Inventors:

Walter E. Milberger - Severna Park MD

Assignee:

The United States of America as represented by the Secretary of the Air
Force - Washington DC

International Classification:

H03F 316

US Classification:

330277

Abstract:

A high power, high voltage linear field effect transistor amplifier apparatus utilizing an automatic gate biasing network to normalize the gate threshold voltages of a plurality of field effect transistors which are in either series or parallel. Thus, these series or parallel combinations of field effect transistors may be operated as linear devices. A high-voltage, high power, wide-band carrier controlled linear amplifier is provided by utilizing an oscillator as a driver.

US Patent:

51629658, Nov 10, 1992

Filed:

Jun 28, 1991

Appl. No.:

7/722820

Inventors:

Walter E. Milberger - Panama City FL
Franklin B. Jones - Catonsville MD
Charles S. Kerfoot - Pasadena MD

Assignee:

The United States of America as represented by the Secretary of the Air
Force - Washington DC

International Classification:

H02H 308

US Classification:

361 56

Abstract:

A high-speed high-voltage FET current interrupter which opens the cathode circuit of microwave tubes when internal tube arcing occurs. By removing the detrimental fault current which causes degradation to the microwave tube body and grid, the longevity of the microwave tube and the pulse energy storage capacitor is greatly increased over those transmitters which use dissipative crow bar circuits. Even more important is that the transmitter reset time after an arc occurs is orders of magnitude faster than transmitters using crow bars or primary power interrupters when arcing occurs--an important feature when engaged in a "dog fight".

US Patent:

41319389, Dec 26, 1978

Filed:

Apr 15, 1977

Appl. No.:

5/788093

Inventors:

Walter E. Milberger - Severna Park MD
Frederick J. Rowe - Millersville MD

Assignee:

Westinghouse Electric Corp. - Pittsburgh PA

International Classification:

H02M 308

US Classification:

363101

Abstract:

A voltage regulator for providing a predetermined output voltage from an unregulated voltage input is described where the output voltage is compared with a reference voltage to generate one or more control signals which in turn activate boost regulators which inject voltage onto the output. Each boost regulator utilizes a transformer for injecting the voltage onto the output and a bypass diode across the transformer to permit the input voltage less the diode voltage drop to appear at the output when the boost regulator is not activated.