公开(公告)号：DE69900626T2

公开(公告)日：2002-09-12

申请号：DE69900626

申请日：1999-03-24

Applicant: MICROCHIP TECH INC

Inventor： BRUWER FREDERICK ,  SMIT WILLEM

IPC: H03B5/08 ,  H03B1/00 ,  H03B5/20 ,  H04B1/04

Abstract: A transmitter system having an adjustable monolithic frequency stabilization and tuning internal capacitor circuit. The transmitter system has a transmitter for generating and transmitting a transmitter oscillator frequency signal. A data generating chip is coupled to the transmitter. The data generating chip is used for adjusting and controlling the transmitter oscillator frequency signal. A variable capacitor circuit is located internal to the data generating chip and is coupled to a ground pin and one of a plurality of function pins on the data generating chip. The variable capacitor circuit is used for adjusting and setting the centerpoint of the transmitter oscillator frequency signal.

公开(公告)号：ES2085425T3

公开(公告)日：1996-06-01

申请号：ES91304847

申请日：1991-05-29

Applicant: MICROCHIP TECH INC

Inventor： BRUWER FREDERICK JOHANNES ,  SMIT WILLEM ,  KUHN GIDEON JACOBUS

IPC: G07C9/00 ,  G07F7/00 ,  G07F7/10 ,  E05B49/00

公开(公告)号：DE69118748D1

公开(公告)日：1996-05-23

申请号：DE69118748

申请日：1991-05-29

Applicant: MICROCHIP TECH INC

Inventor： BRUWER FREDERICK JOHANNES ,  SMIT WILLEM ,  KUEHN GIDEON JACOBUS

IPC: G07C9/00 ,  G07F7/00 ,  G07F7/10 ,  E05B49/00

公开(公告)号：DE60037625D1

公开(公告)日：2008-02-14

申请号：DE60037625

申请日：2000-09-21

Applicant: MICROCHIP TECH INC

Inventor： MARNEWECK WILLEM ,  SCHIEKE PETER ,  SMIT WILLEM

IPC: H03F3/45 ,  H04B1/59 ,  G06K19/07 ,  H03F1/30 ,  H03F3/195

Abstract: A radio frequency transponder device in an integrated circuit package requires only one dedicated pin for connection to a parallel resonant tuned circuit for receiving a remote signal. The one dedicated pin has a capacitor which blocks direct current (DC) flow and allows independent DC biasing of a radio frequency amplifier for increased signal amplification gain. Another package pin used for common power or ground connections supplies the second connection to the resonant tuned circuit. Multiple transponder inputs may be implemented in a single integrated circuit package using only one dedicated pin per input plus one common pin which may be used for another purpose, such as a power or a ground connection.

公开(公告)号：DE60033752T2

公开(公告)日：2007-11-08

申请号：DE60033752

申请日：2000-09-22

Applicant: MICROCHIP TECH INC

Inventor： MARNEWECK WILLEM ,  CHEN MEILING ,  SMIT WILLEM

IPC: G11C16/22 ,  G11C17/00 ,  G06F12/16 ,  G06F15/78 ,  G11C5/14 ,  G11C16/02 ,  G11C16/06 ,  G11C16/14 ,  G11C16/30 ,  G11C29/12

Abstract: An electronic system, comprising a digital processor and an EEPROM, has circuit logic and program software or firmware for determining if a programming voltage level is sufficient for reliably programming the EEPROM. A charge pump is enabled and generates a voltage used for programming of the EEPROM. The enabled charge pump thereby loads a battery power supply. In addition, a test load may be connected to the output of the charge pump to simulate the EEPROM load during a programming operation to the EEPROM. The charge pump output voltage is measured to determine if at least a desired voltage value is obtained. Once the charge pump voltage level has been pre-qualified for the desired voltage value, an actual programming operation to the EEPROM may be performed. If the voltage level does not reach the desired value then a programming operation is inhibited and the electronic system may alarm or shut down operation. The charge pump voltage level is a good indication and measure of battery charge condition under actual EEPROM programming load conditions.

公开(公告)号：AT356409T

公开(公告)日：2007-03-15

申请号：AT00120721

申请日：2000-09-22

Applicant: MICROCHIP TECH INC

Inventor： MARNEWECK WILLEM ,  CHEN MEILING ,  SMIT WILLEM

IPC: G11C17/00 ,  G06F12/16 ,  G06F15/78 ,  G11C16/02 ,  G11C16/06 ,  G11C16/14 ,  G11C16/22 ,  G11C16/30 ,  G11C29/12 ,  G11C5/14

Abstract: An electronic system, comprising a digital processor and an EEPROM, has circuit logic and program software or firmware for determining if a programming voltage level is sufficient for reliably programming the EEPROM. A charge pump is enabled and generates a voltage used for programming of the EEPROM. The enabled charge pump thereby loads a battery power supply. In addition, a test load may be connected to the output of the charge pump to simulate the EEPROM load during a programming operation to the EEPROM. The charge pump output voltage is measured to determine if at least a desired voltage value is obtained. Once the charge pump voltage level has been pre-qualified for the desired voltage value, an actual programming operation to the EEPROM may be performed. If the voltage level does not reach the desired value then a programming operation is inhibited and the electronic system may alarm or shut down operation. The charge pump voltage level is a good indication and measure of battery charge condition under actual EEPROM programming load conditions.

公开(公告)号：DE69715117D1

公开(公告)日：2002-10-10

申请号：DE69715117

申请日：1997-02-21

Applicant: MICROCHIP TECH INC

Inventor： HEWITT KENT ,  SMIT WILLEM ,  VAN ROOYEN EMILE ,  BRUWER FREDERICK

IPC: H03K21/08 ,  G07C9/00 ,  H04L9/06 ,  H03K21/00 ,  H03K21/40 ,  E05B49/00

Abstract: According to the present invention there is provided an encoder, which in one embodiment, includes a processing circuit which generates an output code according to an encoding algorithm, a counter circuit for incrementing a counter value such that only one bit of the counter value changes each time the counter value is incremented, a non-volatile memory for storing the counter value, and a transmitter which transmits the output code and the counter value. In another embodiment of the invention there is provided a method for use with an encoder having a processing circuit which generates an output code according to an encoding algorithm, a counter circuit for incrementing a counter value, a non-volatile memory for storing the counter value, and a transmitter which transmits the output code and the counter value. In one embodiment, the method includes the steps of incrementing the counter value such that only one bit is changed each time the counter is incremented. In still a further embodiment the method includes the steps of using a semaphore register and determining whether the semaphore register is set to 0.

公开(公告)号：EP0829141A4

公开(公告)日：1999-10-20

申请号：EP97907871

申请日：1997-02-21

Applicant: MICROCHIP TECH INC

Inventor： HEWITT KENT ,  SMIT WILLEM ,  VAN ROOYEN EMILE ,  BRUWER FREDERICK

IPC: H03K21/08 ,  G07C9/00 ,  H04L9/06 ,  H03K21/00

CPC classification number: G07C9/00182 ,  G07C2009/00253 ,  G07C2009/00769

Abstract: The present invention provides an encoder (100) including a processing circuit which generates an output code according to an encoding algorithm, a counter circuit for incrementing a counter value such that only one bit of the counter value changes each time the counter value is incremented, a non-volatile memory (112) for storing the counter value, and a transmitter which transmits the output code and the counter value.

公开(公告)号：EP0830687A4

公开(公告)日：2001-03-21

申请号：EP97907873

申请日：1997-02-21

Applicant: MICROCHIP TECH INC

Inventor： HEWITT KENT ,  SMIT WILLEM

IPC: G06F12/14 ,  G06F21/06 ,  G11C16/02 ,  G11C16/22 ,  G11C16/06

CPC classification number: G11C16/22

Abstract: An electronic encoding device comprising a non-volatile memory (112), a controller (102) coupled to the non-volatile memory (112), encoder logic (114) coupled to the non-volatile memory (112), input logic (118) coupled to the controller (102), output logic (116) coupled to the non-volatile memory (112), and a voltage level detection circuit (113) coupled to the non-volatile memory (112), which provides a signal responsive to a non-volatile memory write voltage to enable a read from the non-volatile memory (112). The electronic encoding device is capable of preventing unauthorized access to data stored in the non-volatile memory (112).