Method and electrical circuit for regulating dead time given varying pulse repetition rates

• US 6,252,446 B1
• Filed: 11/19/1999
• Issued: 06/26/2001
• Est. Priority Date: 12/19/1997
• Status: Expired due to Fees

• Current Assignee: MTU Motoren- und Turbinen-Union Muenchen GmbH
• Original Assignee: MTU Motoren-Und Turbinen-Union Munchen GmbH
• Inventors: Zielinski, Michael, Ziller, Gerhard
• Primary Examiner(s): Wells, Kenneth B.
• Assistant Examiner(s): Dinh, Paul
• Application Number:
  US09/367,908
• Time in Patent Office: 585 Days
• Field of Search: 327/172, 327/173, 327/174, 327/175, 327/176
• US Class Current: 327/172
• CPC Class Codes: H03K 5/1252 Suppression or limitation of noise or interference specially adapted for transmission systems H04B15/00, H04L25/08

Abstract

A method and an electrical circuit for converting highly structured analog signals arriving with variable pulse frequency into trigger pulses with an electronic circuit that locks the trigger pulses for a specific time, which is referred to as a dead time. The dead time being adapted to the current pulse frequency of the analog signals.

Claims

1. A method for converting highly structured analog signals arriving with variable pulse frequencies into trigger pulses, said method comprising the steps of:

receiving analog signals;

identifying a current pulse frequency of said analog signals;

generating a dead time adapted to said current pulse frequency;

locking said trigger pulses for a locking period equal to said dead time; and

outputting said trigger pulses upon expiration of said locking period.

2. The method according to claim 1, further comprising the steps of:

is if said received analog signals exceed a threshold limit, converting said analog signals into raw pulses having a defined voltage;

converting said raw pulses into trigger pulses having a variable pulse width corresponding to said dead time and having a fixed pulse height;

setting said pulse width of said trigger pulses according to a setting signal;

forming a temporal average of said trigger pulses; and

generating said setting signal by comparing said temporal average of said trigger pulses to a reference signal.

3. The method according to claim 2, further comprising the step of:

converting said trigger pulses into final pulses having a defined pulse height and a defined pulse width.

4. The method according to claim 2, further comprising the step of:

defining said reference signal in a range of control determined by an upper and a lower voltage level of said trigger pulses and by a relative pulse width of said analog signals.

5. The method according to claim 2, further comprising the step of:

defining said reference signal in a range of control having a left limit defined by a sum of a lower voltage level U₁ of said trigger pulses and twice a product of a quotient of pulse duration T_P and cycle T_A of said analog signals with a difference of an upper U_h and a lower U₁ voltage level of said trigger pulses, and having a right limit defined by a sum of said lower voltage level U₁ of said trigger pulses and half said difference between said upper voltage level U_h and said lower voltage level U₁ of said trigger pulses,

this being abbreviated as;

$\left[U_1+2<br><br>\frac{T_P}{T_A}<br><br>\left(U_h-U_1\right),\text{\hspace{1em}<br><br>}<br><br>U_1+\frac{1}{2}<br><br>\left(U_h-U_1\right)\right]<br><br>\text{.}$

6. The method according to claim 2, wherein said converting said analog signals into raw pulses being implemented in a comparator.

7. The method according to claim 2, wherein said converting said raw pulses into said trigger pulses being implemented in a first mono-vibrator having a control input.

8. The method according to claim 2, further comprising the step of:

controlling said pulse width of said trigger pulses by a value of said setting signal and by blocking said input of said first pulse generator during output of said trigger pulses from said first pulse generator.

9. The method according to claim 2, wherein said forming said temporal average of said trigger pulses being implemented in a low-pass filter.

10. The method according to claim 2, wherein said comparing said temporal average of said trigger pulses to said reference signal being implemented in a PID regulator.

11. The method according to claim 2, wherein said converting said trigger pulses to final pulses being implemented in a second mono-vibrator.

12. A n electrical circuit for converting highly structured inputted analog signals having variable pulse frequencies into trigger pulses, said electrical circuit comprising:

an electrical device for identifying a current pulse frequency of said inputted analog signals, for generating a dead time adapted to said current pulse frequency, for locking said trigger pulses for a period equal to said dead time before outputting said trigger pulses, and for outputting said trigger pulses.

13. The electrical circuit according to claim 12, wherein said electrical device further comprises:

a trigger module for converting said analog signals into raw pulses having a defined voltage upon said analog signals having a voltage exceeding a threshold voltage;

a first pulse generator following said trigger module for converting said raw pulses into trigger pulses having a variable pulse width corresponding to said dead time and having a fixed pulse height, said first pulse generator having a control input;

a third component for generating a temporal average of said trigger pulses;

a regulator for comparing said temporal average of said trigger pulses to a reference signal, and outputting a result of said comparison as a setting signal to said control input of said first pulse generator, and for controlling a pulse width of said trigger pulses by blocking a further input of analog signals.

14. The electrical circuit according to claim 13, wherein said trigger module is a comparator.

15. The electrical circuit according to claim 13, wherein said first pulse generator is a first mono-vibrator having a control input.

16. The electrical circuit according to claim 13, wherein said third component is a low-pass filter.

17. The electrical circuit according to claim 13, wherein said regulator is a PID regulator.