DE1932764B2 - Circuit for the optional quasi-continuous tuning of a decadic frequency synthesizer - Google Patents

Description

The invention relates to a circuit for optionally quasi-continuous Tuning a decade frequency synthesizer, in which the setting of the Frequency in every decade with digitally working counting decades and memories, in which the counting result for each of the counting decades is recorded separately for evaluation will.

It is a circuit arrangement for continuous frequency variation proposed within a decadal frequency generator based on the principle the binary frequency division by means of frequency dividers switched in stages and in the case of a tunable high-frequency oscillator connected in stages and adjustable decadic frequency divider is connected, its output voltage a phase discriminator is fed, which is also from a reference voltage is fed.

In this circuit, the frequency is that of the phase discriminator r supplied reference voltage can be varied continuously. However, this path continues for remote control an analogue transmission, which experience has shown to be proportionate is prone to failure.

It is also known, the oscillator frequency of a heterodyne receiver counting by means of a preselected electronic counter, so that the counter displays the immediate reception frequency.

From the German Auslegeschrift 1 149 053 it is known to record measured values, which are available in digital form, to be transmitted remotely by means of so-called pulse telegrams. Here, the digital values are converted into series information by means of a parallel data converter and - after the remote transmission again by means of a series-parallel converter in implemented digital information.

Furthermore, from the German Auslegeschrift 1 261 192 is a method known for remote setting of the reception frequency, in which the remote transmitting digital Reception frequency value continuously at the remote location with the frequency value of the remote serving receiver compared and the latter is set so that both frequency values to match.

There is also a local oscillator for transmit and receive converters, especially for the shortwave range, proposed that the frequency with the help a decadic device adjustable in steps and by optional switching is continuously tunable. The frequency is measured in this arrangement with continuous coordination through the use of digitally working counting decades and memories, in which the counting result is recorded separately for each of the counting decades will. In this oscillator, a keying device is used in the decadic device of the oscillator, by means of which after switching to decadic tuning the counting result stored in the memories of each counting decade of the continuous Vote is held in the decadic device of the oscillator. The establishment to subsequently change the count of the individual counting decades in both Counting directions consists of a counting pulse input device which, when switched on the decadic vote separately for each counting decade in their number from the Position of individual hand switch-dependent impulses assigned to the counting decades and at the same time for each counting decade information about the counting direction determining Direction of movement of the respective handset.

The invention is based on the object of remotely or locally controlled Develop decadal frequency synthesizers so that the disadvantages and difficulties the known arrangements can be avoided, with as little operating effort as possible is guaranteed while achieving a low susceptibility to failure. According to the invention, which relates to a circuit of the type mentioned above, this task becomes solved in such a way that between adjusting organs for the frequency within each Counting decade and the binary inputs of the frequency synthesizer within each decade an up / down counter is switched on, with memory inputs for the Activation by the setting organs, with clock inputs for additional forward and Down counting, with blocking inputs to block the memory inputs and the clock inputs, with outputs for controlling the frequency synthesizer and with two carry outputs for connection to the clock inputs of the up / down counter of the next higher Counting decade is provided that a switchover device with a control matrix is provided is, on the one hand in the switch position "decadic tuning" the memory inputs the up-down counter is set via a blocking input so that the information attached to them is transferred to the internal memory and are thus available at the outputs for controlling the frequency synthesizer, and on the other hand in the "quasi-continuous coordination" switch position this blocking input blocks the memory inputs of the up / down counter and whose clock inputs for upward and downward counting enable a pulse generator is provided with a direction of movement discriminator that is dependent on the adjustment variable of an actuating device that can be adjusted in two directions certain number of pulses and a direction criterion for up or down counting outputs and on the output side with the clock inputs for up or down counting optionally with the help of a selector switch via the control matrix one of the Up-down counter is connected and that the up-down counter such are designed that when the switch position is switched on »quasi-continuous Tuning "to the respective count value stored in them by means of the actuating device the counter value set by the pulse generator is added or subtracted and used as an addition or subtraction result is pending at the outputs to the frequency synthesizer. With With this arrangement, it is thus possible to use the previously set by decadal tuning Correct frequency up or down. The quasi-continuous tuning range is identical to the reception or transmission area. When returning from the quasi-continuous to the decadic adjustment is done beforehand on the setting organs for the frequency within each counting decade back to the Frequency synthesizer delivered.

At the outputs of the up-down counters are more advantageous Way with the interposition of a decoder connected display tubes. Both with decadal voting and in tuning mode during the "quasi-continuous tuning" position, for example in the case of a receiver, the reception frequency directly on these display units read off.

According to an advantageous development, the frequency hops can be increased the invention with quasi-continuous tuning stages. There is also one more Selector switch having switch positions is provided, which controls the control matrix in such a way that that in one position the signals supplied by the pulse generator only the Pulse inputs of the up / down counter within the counting decade with the finest grid gradations are fed. In the other positions of this selector switch becomes only one of the following up-down counting decades actuated, and the counting decades arranged in front of these with finer grid steps are blocked via a further blocking input.

The circuit according to the invention is particularly suitable for remote control of the frequency as it works exclusively in a digital way and therefore no analog values have to be transmitted. Also the signals for the Quasi-continuous retuning is entered into the circuit in digital form.

Further details of the invention are given on the basis of exemplary embodiments explained in more detail.

FIGS. 1 a and 1 b show, placed side by side, the block diagram the circuit arrangement outside the actual synthesizer at a receiver for optional local or remote control operation.

The circuit has seven decades, with the frequency gradation in the first decade is 10 Hz and that in the last decade is 10 MHz.

Each of the decade stages has an up / down counting decade, which are designated by Z1 to 77.

The requirement to enable both local and remote-controlled operation, is on site with the help of a switch S3 in connection with gate units UO bis U7 realized. In the case of locally operated operation, this switch S 3 is in the Position 1. The decimal code supplied by the decade switches DS 1 to DS7 is with the help of the coders assigned to each decade (71 to C 7 in the also for the Remote control provided binary coded decimal code (ECD code) translated and Via gate units U 1 to U7 to four memory inputs DA, DB, Dc and DD of the up-down counting decades Z1 to 77 passed on.

With a switch S1, either decadic or the quasi-continuous tuning switched on. The switch is located S1 in position 1 for decadic tuning, a control matrix M delivers a logical zero at the d inputs of the up-down counting decades 71 to 77, d. i.e. the information pending at the memory inputs DA, DB, Dc, DD are transferred to the corresponding internal memory and are available at the four outputs A, B, C and D of the individual up / down counting decades Z1 to 77 in direction to the frequency-determining inputs F 1 to F 6 of the frequency synthesizer available. These signals also become the decoding and display units associated with each decade D 1 to D 7 out.

The frequency setting of the synthesizer takes place in this context i.e. directly on the rotary knobs DS 1 to DS7 assigned to each decade: Will now the switch S1 is in position 2, d. i.e., becomes the quasi-continuous Tuning switched on, the memory inputs are then via the control matrix M. DA, DB, DC and DD of the individual up-down counting decades Z1 to 77 over the d-inputs blocked and at the same time the clock inputs and TR enabled for counting. A pulse generator P with a direction of movement discriminator now delivers as a function from the angle of rotation of a tuning knob a certain number of pulses and that Direction of rotation criterion. Thus it is possible to vote beforehand by decadal voting correct the set frequency up or down. The quasi-continuous The tuning area is identical to the reception area.

In addition, the receiving frequency is in quasi-continuous tuning mode displayed directly on the display units DT to D7.

In order to do justice to the different applications of the device, if the frequency jumps are classified with quasi-continuous tuning between 10 Hz, 100 Hz and 1000 Hz. A selector switch S2 is provided for this purpose. In its In position 1, tuning takes place in 10 Hz steps. The ones supplied by the pulse generator P. Signals are only sent to the clock inputs Tv- and TR of the up-down counting decade 71 supplied. In position 2, i.e. H. when tuning in 100Hz jumps in connection with the control matrix via the input the pulse inputs of the up-down counting decade Z1 blocked and its flip-flops forming the counting decade to a logical zero set. At the same time, two transmission outputs Ü and L are used by the up / down counting decade 71 by means of a switching matrix SM1 from the clock inputs Tv and TR of the following Up / down counting decade Z1 and the output from the pulse generator P are separated Pulses to the corresponding pulse inputs Tv and TR of the second up / down counting decade 72 passed. When tuning in 1000 Hz steps, i. H. when switched on of the selector switch S2 in its position 3, the pulses of the pulse generator P with the help of the control matrix M and a second switching matrix SM2 to the clock inputs Tv and TR of the third up-down counting decade 73 and the two preceding ones Up-down counting decades 71 and 72 are permanently set to zero via the R inputs.

When returning from quasi-continuous to decadal tuning the frequency set on the rotary knobs DS 1 to DS 7 returns to the frequency-determining one Inputs F1 to F 6 of the frequency synthesizer and the decoding and display units D 1 to D 7 submitted.

The inputs FD, FB and FZ1 to FZ7 are used for remote control intended. After converting the serially arriving remote control signals into a parallel display the information is sent to them via simple storage elements (not shown) Remote control inputs passed on. The gate arrangements U0 to U7 serve - for switching from local to remote-controlled operation and are operated by switch S 3.

Appropriately, for the forward Decade counting down Integrated modules switched on, as the space required for them is extremely high are low.

Claims (6)

Patent claims: 1. Circuit for the optional quasi-continuous tuning of a decadal frequency synthesizer in which the setting of the frequency in each Decade with digitally working counting decades and memories in which for evaluation the counting result is recorded separately for each of the counting decades, d u r c h marked that between adjusting elements (DS1 to DS7) for the frequency within each counting decade and the binary inputs (F1 to F6) of the frequency synthesizer an up / down counter (Z1 to Z7) is switched on within each decade, the one with memory inputs (DA, DB, DC, DD) for control by the setting devices (DS1 to DS7), with clock inputs (Tv, TR) for additional up and down counting, with blocking inputs (d, R) to block the memory inputs (DA, Dfi, Dc, DD) and the clock inputs (Tv, TR), with outputs (A, B, C, D) to control the frequency synthesizer and with two carry outputs (Ü, L) for connection to the clock inputs (Tv, TR) of the up / down counter (Z2 to Z7) of the next higher counting decade is that a switching device (S1) with a control matrix (M) is provided, On the one hand, in the switch position (1) »decadic tuning«, the memory inputs (DA, DB, DC, DD) the up / down counters (Z1 to Z7) each via a blocking input (d) so that the information attached to them is stored in the internal memory and thus at the outputs (A, B, C, D) for controlling the frequency synthesizer are available, and the other hand in the switch position (2) »quasi-continuous Vote «via this lock input (d) the memory inputs (DA, DB, Dc, DD) of the Up / down counters (Z1 to Z7) and their clock inputs (Tv, TR) are blocked for upward and downward counting enables a pulse generator (P) with a Direction of movement discriminator is provided depending on the adjustment variable a two-way adjustable actuator a certain number of pulses and a direction criterion for up or down counting and on the output side with the clock inputs (Tv, TR) for up or down counting optionally with the help of a selector switch (S2) via the control matrix (M) one at a time the up / down counter (Z1 72 or Z3) is connected and that the up / down counter (Z1 to Z7) are designed in such a way that when switching position (2) is switched on "Quasi-continuous tuning" to the respective count value stored in them the counter value set by means of the actuating device of the pulse generator (P) is added or subtracted and used as addition or Subtraction result at the outputs (A, B, C, D) to the frequency synthesizer pending. 2. Circuit according to claim 1, characterized in that the control matrix (M) additional liche inputs that correspond to the switch positions of the selector switch (S2) for the different gradation of the frequency jumps with quasi-continuous tuning are assigned that in one of the positions (1) the pulse generator output with the Clock inputs (Tv, TR) of the up / down counter (Z1) for the decade with the finest frequency graduation is effectively connected that in the other positions (2, 3) the pulse generator output with the clock inputs (Tv, TR) of one of the up / down counters (72, Z3) is effectively connected for the next higher decades and that in the latter Positions (2, 3) the clock inputs (Tv, TR) of the up / down counters (71, Z2 or Z3) within the others that can be switched on for quasi-continuous tuning Decades by means of the control matrix (M) and between the individual up / down counters (Z1, Z2) switched on switching matrices (so1, SM2) each via a further blocking input (R) are locked. 3. Circuit according to claim 1 or 2, characterized in that the switching matrix (M) has remote control inputs (FB) that are activated by a switch (S3) can be switched on and the switching devices (S1 and S2) for switching on the quasi-continuous tuning as well as for the different gradations of the Activate frequency jumps with quasi-continuous tuning that between the setting elements (DS1 to DS7) for the decadic frequency setting within every decade and the memory inputs (DA, DB, Dc, DD) of the up / down counter (Z1 to Z 7) and between the pulse generator (P) and the clock inputs (Tv, TR) of the by the quasi-continuous tuning - activated up / down counter (zip, Z2) each having a remote control input for decadic frequency setting Switching unit (UO to U7) is switched on, which is controlled by the switch (83) for Activation of local or remote operation either local Setting elements (DS1 to DS7) or the remote control inputs (FZX to FZ7) to the memory inputs DA, DB, DC, DD) as well as the pulse generator (P-) or the one remote control input of a Pulse generator for quasi-continuous tuning through connected. 4. A circuit according to claim 3, characterized in that between the setting elements (DS1 to DS7) for the decadic frequency setting within every decade and the switching units connected upstream of the memory inputs (DA, DB, DC, DD) (U1 to U7) Coding devices (C1 to C7) are switched on, which use the decimal code translate the setting units into the binary coded decimal code (BCD code). 5. A circuit according to claim 3, characterized in that a device for converting the serially arriving remote control signals into a parallel display is provided. 6. Circuit according to one of the preceding claims, characterized in that that to the outputs of the up-down counters (Z1 to Z7) with the interposition each of a decoder display tubes (D1 to D 7) are connected.