WAVE GENERATOR HAVING FREQUENCY-DEPENDENT TRIGGER LEVEL FOR CORRECTION OF LOOP DELAY

• US 3,617,769 A
• Filed: 03/12/1969
• Issued: 11/02/1971
• Est. Priority Date: 03/12/1969
• Status: Expired due to Term

• Current Assignee: Raymond C. Hanson
• Original Assignee: Raymond C. Hanson
• Inventors: Hanson, Raymond C.
• Primary Examiner(s): Miller, Jr., Stanley D.
• Application Number:
  US04/806,568
• Time in Patent Office: 965 Days
• Field of Search: 307/228,229,261,264,271,286 328/127,181-184
• US Class Current: 327/133
• CPC Class Codes: H03K 3/26 by the use, as active elements, of bipolar transistors with internal or external positive feedback H03K3/023, H03K3/027 take precedence
• CPC Class Codes: H03K 4/06 having triangular shape

Abstract

A wave generator includes an integrator with adjustable upper and lower limit detectors coupled to the output of the integrator for periodically reversing the current applied to the integrator to produce a repetitive triangle wave. The upper and lower levels of the triangle wave at which the detectors are actuated are altered as the operating frequency of the circuit increases.

Claims

1. Signalling apparatus comprising:

integrator means having an input and an output;

source means connected to the input of said integrator means for applying signal thereto of selected amplitude and polarity in response to control signal applied thereto;

circuit means including a pair of trigger circuits connected to apply control signal to said source means for reversing the polarity of signal applied to said integrator means in response to the amplitude of the signal appearing at the output of said integrator means attaining selected upper and lower trigger levels which are altered in response to a level-adjusting signal applied thereto; and

level-control means connected to apply to said circuit means for altering the trigger level thereof a level-adjusting signal which is representative of the delay in said source means reversing the polarity of signal applied to said integrator means, the level-control means including for each of said trigger circuits a peak detector responsive to a selected one of the upper and lower peak amplitudes of the signal appearing at the output of said integrator means for decreasing the respective one of said upper and lower trigger levels in response to increase in the corresponding one of the upper and lower peak amplitudes of the signal appearing at the output of said integrator means.

2. Signalling apparatus comprising:

integrator means having an input and an output;

source means connected to the input of said integrator means for applying signal thereto of selected amplitude and polaRity in response to control signal applied thereto;

circuit means connected to apply control signal to said source means for reversing the polarity of signal applied to said integrator means in response to the amplitude of the signal appearing at the output of said integrator means attaining a selected trigger level which is altered in response to a level-adjusting signal applied thereto;

level-control means connected to apply to said circuit means for altering the trigger level thereof a level-adjusting signal which is representative of the delay in said source means reversing the polarity of signal applied to said integrator means, said level-control means including an amplitude detecting circuit responsive to the signal appearing at the output of said integrator means for decreasing said selected trigger level at which the circuit means applies control signal to said source means in response to an increase in the peak amplitude of the signal appearing at the output of said integrator means;

said circuit means including a first tunnel diode which is connected to produce a positive trigger signal in response to the signal appearing at the output of said integrator means attaining an upper selected trigger level and a second tunnel diode which is connected to produce a negative trigger signal in response to the signal appearing at the output of said integrator means attaining a lower selected trigger level;

said amplitude-detecting circuit being connected to supply to said first and second tunnel diodes bias currents which decrease the respective trigger levels with increasing peak amplitude of the signal appearing at the output of said integrator means; and

said circuit means also including a multivibrator circuit connected to respond to the alternate application thereto of the positive and negative trigger signals for applying a square wave control signal to said source means to reverse the polarity of signal applied to the input of said integrator means thereby at each transition of said square wave control signal.