The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 14, 1985
Filed:
Nov. 16, 1982
Guenter Lindstedt, Freiburg, DE;
Guido H Nopper, Umkirch, DE;
ITT Industries, Inc., New York, NY (US);
Abstract
To be able to recover from modes in which the oscillation of the voltage-controlled oscillator (V0) stops, the phase/frequency control circuit includes an RS flip-flop (RS) connected via two AND gates (U3, U3) to the two outputs (A1, A2) of the phase discriminator (P), which provide pulses for raising and lowering, respectively, the frequency of the voltage-controlled oscillator (V0). When the frequency/phase control circuit is out of lock, a pulse is generated with two monostable multivibrators (M1, M2) which passes through a signal selection circuit (S1) associated with the Q output of the RS flip-flop or through a signal selection circuit (S2) associated with the Q output of this flip-flop and controls the constant-current source (Q1) charging the smoothing device (G) or the constant-current source (Q2) discharging this device in such a way that the unwanted mode can be stopped by changing the control voltage of the oscillator (V0).