PAUL H DAVIS
Real Estate Commission in Reading, PA

6798298, Sep 28, 2004

Nov 16, 2001

09/993588

Paul C. Davis - Reading PA
Irving G. Post - Reading PA

Agere Systems Inc. - Allentown PA

H03L 700

331 16, 331 25, 327264, 327285, 327413

A balancing circuit and method of operation thereof for use with a circuit having first and second complementary drivers exhibiting different current gain characteristics. In one embodiment, the balancing circuit includes a sensing subcircuit that provides a correction signal indicating a first current gain characteristic of the first driver. The balancing circuit also includes a compensation subcircuit that generates a current gain compensation signal to the first driver to substantially match a second current gain characteristic of the second driver based on the correction signal.

6023196, Feb 8, 2000

Aug 3, 1998

9/127752

Kirk B. Ashby - Reading PA
Paul C. Davis - Reading PA
Michael D. Womac - Blandon PA

Lucent Technologies Inc. - Murray Hill NJ

H03F 130, H03F 345

330290

In low-voltage circuits, there is often insufficient voltage to use a current source to bias a transconductance amplifier stage. This is particularly true in mixers where a switching circuit must be stacked on top of the transconductance input stage. One way around this problem is to get "double-duty" out of the input differential pair, using it both for gain stage and for DC bias. This is done by AC coupling in a high-frequency input signal, while using a low-frequency, DC-coupled circuit to establish the proper bias level. One common technique is to use a simple current mirror scheme to establish the DC level. Proper biasing using this technique requires good matching of resistance. In some implementations of transconductance amplifiers, particularly those that use inductors as degeneration elements, series resistance of the inductor and interconnect resistance can cause significant errors in the bias current. This invention addresses that problem by using an operational amplifier with a current-sensing resistor and a low-frequency feedback loop to compensate automatically for any resistance errors.

5917379, Jun 29, 1999

Jul 31, 1997

8/903012

Kirk B Ashby - Reading PA
Paul C. Davis - Reading PA

Lucent Technologies Inc. - Murray Hill NJ

H03F 345

330260

A compensation scheme for differential- or single-input transconductance amplifiers relies on an active feedback path with a resistive pole-splitting compensation circuit. The resistive compensation circuit causes pole-splitting of the two dominant poles, moving one pole to a slightly lower frequency and the other to a much higher frequency compared to the dominant poles of the uncompensated amplifier. A DC-blocking capacitor may also be placed in series with the resistor of the compensation circuit to allow for proper biasing of the circuit. By selecting appropriate values for the passive elements in the compensation circuit, the compensation scheme of the present invention can cause the amplifier to operate in a stable, linear manner over the same or even a larger bandwidth than an equivalent amplifier without compensation. The present invention does not suffer the problems of standard narrowbanding compensation schemes associated with high frequency cut-off.

6909150, Jun 21, 2005

Jul 23, 2001

09/911035

Paul C. Davis - Reading PA, US

Agere Systems Inc. - Allentown PA

H01L029/76

257368, 257370, 257506, 257508, 257544, 257547, 257372

An integrated circuit having improved isolation includes a first circuit section formed in a substrate and a second circuit section formed in the substrate, the second circuit section being spaced laterally from the first circuit section. The integrated circuit further includes an isolation buried layer formed under at least a portion of the first circuit section, and a conductive layer formed on a surface of the substrate and electrically coupled to the buried layer and to a voltage reference, the conductive layer reducing an effective lateral resistance of the buried layer, whereby an isolation between the first and second circuit sections is increased. A second isolation buried layer can be formed under at least a portion of the second circuit section as well to provide further isolation between the first and second circuit sections.

5929708, Jul 27, 1999

Nov 20, 1997

8/974818

Paul Cooper Davis - Muhlenberg Township PA
Milton Luther Embree - Muhlenberg Township PA
Brian K. Horton - Sinking Springs PA

Lucent Technologies Inc. - Murray Hill NJ

H03F 304

330288

A power-conserving, linear and broad band RF amplifier, suitable for use at more than one band in the ultra-high frequency regions allotted to radiotelephone transceivers, employs an emitter-follower output transistor to deliver the nominal 1. 0 milliwatt RF power to a single-ended load from a low voltage battery, typically 2. 7 v. dc, without the use of output coupling transformers. The amplifier receives only a small differential input signal from the preceding mixer or multiplier stage having a typical peak-to-peak magnitude of 0. 3 v. The differential input signal is applied to the emitters of a pair of transistors whose bases are interconnected, one transistor of which (B6) is diode-connected in a current-mirror configuration and the other (B5) of which is configured in a common-base connection with emitter degeneration. The signals are summed at the collector of the common-base transistor to deliver a substantial voltage swing, illustratively 1. 7 volts peak to peak, which is large enough to drive the base of the emitter-follower output transistor (B3) without requiring the high standby current in the emitter-follower normally required to maintain an emitterfollower in Class A operation.

4715049, Dec 22, 1987

Mar 12, 1986

6/838709

George E. Andrews - Fleetwood PA
Paul C. Davis - Reading PA
Dennis C. Farley - Coopersburg PA
Stanley H. Kravitz - Coopersburg PA
Thrygve R. Meeker - Allentown PA
Owe G. Petersen - Reading PA
Arthur W. Schelling - Emmaus PA

American Telephone and Telegraph Company, AT&T Bell Laboratories - Murray Hill NJ

H04L 700

375106

A clock recovery and data retiming circuit is disclosed which utilizes a SAW filter to form the recovered clock signal. The phase shift of the received data signal associated with various attenuation and distortion effects of the communication channel is compensated for and removed from the retimed data signal by adjusting the phase of the SAW filter.

H9652, Sep 3, 1991

Jan 26, 1990

7/471185

Paul C. Davis - Reading PA
Scott L. Forgues - Wyomissing PA
Iconomos A. Koullias - West Lawn PA

American Telephone and Telegraph Company - New York NY

H03F 345

330254

Differential amplifier having multiple stages, each stage having the gain thereof set by digital control. The gain of each stage is individually controlled, thereby allowing wide dynamic range and gain. Each stage has a differential pair with multiple sets of gain-setting resistors in the emitters of the pair. By selecting which resistor set, or combination of resistor sets, is used, the gain of the stage is controlled. The result is a 4 stage, 0-45 dB gain amplifier for RF or IF applications, with the gain adjustable in 3 dB increments.

5724653, Mar 3, 1998

Dec 20, 1994

8/359782

Thomas Wesley Baker - Orefield PA
Paul Cooper Davis - Reading PA
Douglas D. Lopata - Boyertown PA
Owe George Petersen - Brookfield WI
Trudy Dawn Stetzler - Reading PA

Lucent Technologies Inc. - Murray Hill NJ

H04B 112

455296

The present invention relates to a radio receiver adapted for use in a time division multiple access (TDMA) system. The radio receiver includes DC compensator circuits configured to decrease the time required to cancel DC offset before received data bursts by DC coupling a radio frequency (RF) demodulator to a baseband channel. The radio receiver may also employ AC capacitive coupling having time modification so as to increase the AC coupled setting time and provide a low pole in a RF-to-Baseband interface.

4332984, Jun 1, 1982

Dec 13, 1979

6/103404

Paul C. Davis - Reading PA
Raymond G. Jackson - Indianapolis IN
Kenneth F. Sodomsky - Reading PA
Dennis L. Whitson - Blue River Township, Hancock County IN

Bell Telephone Laboratories, Incorporated - Murray Hill NJ

H04M 100

179 81R

In a subscriber telephone set, an active speech network provides a sidetone signal and for equalization of the transmit and receive signals at the tip and ring line port and also maintains the dc voltage at a substantially constant level at this port. The network is compatible with conventional telephone sets and operation on long loops in parallel with such sets is provided for. Internal circuitry (320) within the network check both loop current and tip-to-ring voltage to ensure that both are of a magnitude sufficient for a tone signaling dial (301) to properly generate tone signals before enabling the dial.