FREDERICK B DAVIS III
Engineers in Delaware
License number
Pennsylvania PE000990K
Category
Engineers
Type
Professional Engineer
Address
Address
2
Delaware
Oakview, PA 19026
Oakview, PA 19026
Professional information
Analog Signal Multiplexer With Noise Rejection
US Patent:
5045851, Sep 3, 1991
Filed:
Dec 21, 1988
Appl. No.:
7/288323
Inventors:
Frederick B. Davis - Drexel Hill PA
Stephen P. Glaudel - Harleysville PA
Sanjay Jhunjhunwala - Patna, IN
Stephen P. Glaudel - Harleysville PA
Sanjay Jhunjhunwala - Patna, IN
Assignee:
General Signal Corporation - Stamford CT
International Classification:
G08C 1506
US Classification:
34087013
Abstract:
In analog multiplexers using solid state multiplexing relays and having a shunt capacitor circuit across each input channel as part of a filter for normal mode noise, common mode noise is rejected by opening the shunt capacitor circuit in at least the selected channel and preferably all channels during the switching cycle of each channel for a full cycle of the a. c. line frequency, the opening spanning the deselection time for the selected channel and the selection time for the next channel.
Electric Demand Control System
US Patent:
4161028, Jul 10, 1979
Filed:
May 30, 1978
Appl. No.:
5/910320
Inventors:
Frederick B. Davis - Drexel Hill PA
Charles W. Ross - Hatboro PA
Charles W. Ross - Hatboro PA
Assignee:
Leeds & Northrup Company - North Wales PA
International Classification:
A02J 1300, G06G 762
US Classification:
364492
Abstract:
There is disclosed a method and means for continuously controlling the consumption of power by an industrial customer wherein the control is accomplished by controlling the generation of the customer's own power source and/or his load in response to a signal representing the change necessary to make the energy consumed equal the demand limit. The gain of the control response is modified so that it is increased with increases in the difference between the energy actually consumed and the desired consumption.