SU966867A1 - Sawtooth signal generator - Google Patents

Description

tS) PYM-SIGNAL GENERATOR

   . one . The invention relates to a pulse technique and is intended to be used, for example, in radio receivers for various purposes. Known driver sawtooth signal containing a clock pulse, the output of which is connected to the input of the frequency divider, the integrating element, the trigger element And 1. The disadvantage of the device is the lack of memory level of the generated voltage. The closest technical solution to the proposed one is a sawtooth signal generator, - containing a master pulse generator, the first output of which is connected to the input of the integrating element C2. . The disadvantage of the device is the low accuracy of fixing the levels of the sawtooth sy. The purpose of the invention is to improve the accuracy of fixing the level of the saw-tooth signal. The goal is achieved by the fact that a pulse-phase generator containing a pulse generator, the first output of which is connected to the input of an integrating element, a pulse-phase detector, a gate generator, whose input is connected to the second output of the master pulse generator, goes to the first input pulse-phase detector, the second input of which is connected to the output of the integrating element. The shaper of gating pulses contains two keys, a frequency divider, the OR element, a trigger, a pulse shaper, the output of which is connected to the output of the gating pulse shaper, the input is connected to the output of the OR element, the first input of which is connected to the output of the first key.

the second vhshd through the frequency divider with the output of the second key, the first input of which is connected to the first input of the second key and the input of the gating pulse shaper, the second input to the first output of the trigger second input of the second key is connected to the second output of the frequency divider.

FIG. 1 shows a block diagram of the device; in fig. 2 - diagrams that show the work of the scheme ..

The device contains a master oscillator H pulses on a clock generator 2, a frequency divider 3, an integrating element k, a pulse-phase detector 5, a driver 6 strobe pulses on the first and second keys 7, 8, the second frequency divider 9, element 10 OR, shaper 11 pulses. trigger 12 .. The division factors of dividers 3 and 9 are the same. The device works as follows. When applying to trigger 12 signal Search levels paraphase outputs. the trigger is set so that key 8 opens and key 7 locks and zeroes frequency divider 9. In this mode, a clock 2a signal is fed to a generator 2 (Fig. 3 and a key 3. Output 3 (Fig. 25J) provides a frequency divider C, which generates a sawtooth voltage from Fig. 26 to the integrator. of the phase detector 5 with a period equal to the period of the clock generator 2 multiplied by the division factor of divider 3. The pulse input of the pulse phase detector 5 is fed from short pulses with the frequency of the clock generator 2 (Fig. 2i.), which are formed when the clock signal passes generator 1 che Cutting the key 8, the element OR 10 and the driver of the pulses 11, the Pulse Phase Detector 5 samples and stores the values of the sawtooth signal with the frequency of the clock generator 1 (Fig. Thus, a ramp signal is generated at the device output. When the Stop signal is triggered 12 (FIG. 2e), the latter is transferred to another state, the key 8 is opened, the key 7 is closed, and the divider 9 is turned on. From this point on, the divider 9 starts counting the pulses of the clock generator 1 at its input through the key 7 and outputting to i q OR 10 signals with a period equal to the period of the sawtooth

signal (Fig. 2g).

Claims (2)

After the pulse former 11, short pulses (Fig. 2h) are fed to the pulse input of the pulse phase detector 5 and the sawtooth signal is gated according to the level determined by the moment of arrival of the Stop signal. As a result, the same level is sampled and memorized from the sawtooth signal period (Fig. 2t, the value of which is determined by the instant of arrival of the signal Stop. Claim of the invention. 1. connected to the input of the integrating element, characterized in that, in order to improve the accuracy of fixing the level of the saw-tooth signal, a pulse-phase detector, a gating driver, is inputted into it connected to the second output of the master pulse generator, the output to the first input of a pulse phase detector, the second input of which is connected to the output of the integrating element. 2. The generator according to claim 1, is made up of the fact that the gate driver contains two keys, frequency unit, OR element, trigger, pulse shaper, the output of which is connected to the output of the gating pulse shaper, input - with the output of the OR element, the first input of which is connected to the output of the first key, the second input through a frequency divider - with the output of the second key, the first input coupled to the first input of the second switch and an input of the strobe pulses, the second input - to the first output of the flip-flop, a second input of the second 29) of the key is connected to a second output flip-flop and a second input of the frequency divider. Sources of information taken into account during the examination 1. USSR Author's Certificate No. 581575, cl. H 03 K V08, 03/10/76. 2. For France of France №, cl. H 07 K V06, 1974. t 1G1lpllllll h