Anthony J Keller

US Patent:

54934869, Feb 20, 1996

Filed:

Mar 17, 1995

Appl. No.:

8/406281

Inventors:

Lawrence E. Connell - Naperville IL
Anthony F. Keller - Chicago IL

Assignee:

Motorola, Inc. - Schaumburg IL

International Classification:

H02M 318

US Classification:

363 60

Abstract:

What is described is a high efficiency voltage doubler (100). The high efficiency voltage doubler (100), has a charge-pump capacitor (30), an inverter (18), a coupling capacitor (24), a complementary switch pair (16), a DC biasing circuit (102), a charging circuit (106), and an input circuit (108). This structure is adapted for use in an integrated circuit, and provides the advantage of maximizing voltage doubled power output and minimizing current consumption with a minimal number of components.

US Patent:

54812291, Jan 2, 1996

Filed:

Nov 29, 1994

Appl. No.:

8/346452

Inventors:

Lawrence E. Connell - Naperville IL
Timothy J. Collins - Downers Grove IL
Anthony F. Keller - Chicago IL
Dennis F. Marvin - Carol Stream IL
Michael L. Bushman - Hanover Park IL

Assignee:

Motorola, Inc. - Schaumburg IL

International Classification:

H03L 102

US Classification:

331158

Abstract:

A temperature compensated crystal oscillator (10), has a crystal oscillator circuit (12), a voltage controlled reactance element (30), a temperature compensation network (50), and a programmable DC-DC converter network (60) having an output (62) connected to the voltage controlled reactance element (30), or the temperature compensation network (50) or both. The DC-DC converter network (60) provides the capability of operating over an extended voltage range, by increasing the supply voltage to a level necessary to operate the voltage controlled reactance element (30). Much of this structure is adapted for use in an integrated circuit, and provides the advantages of minimizing power and current consumption.