DE1064125B - Circuit arrangement with at least one pot circle for amplifying, generating and / or mixing ultra-high frequency vibrations - Google Patents

Description

For the amplification, generation and / or mixing of ultra-high frequency vibrations, e.g. B. with a Frequency of 200 to 600 MHz and higher, one usually has tubes with a disc-shaped electrode, in particular Disk triodes, used, but they are relatively expensive.

Normal tubes, e.g. B. Miniature tubes with pin bases in all-glass technology (radio tubes), like them are cheap on the market in large numbers for lower frequencies, could not be used, because the leads between the outer connection pins and the inner system were so long that together with the mounting springs and the necessary additional supply lines, vibratory structures emerged, which in the tuned state enable a frequency to be used that but the application over a wide, tunable range, e.g. B. for many channels of about 5 MHz in the television sector, prevented.

In the case of a circuit arrangement with at least one pot circle for amplifying, generating and / or Mixing ultra-high frequency vibrations in a wide range of frequencies can be seen as normal Electron tube with pin base, e.g. B. use a miniature tube in all-glass technology, if according to the invention of the base pin and the spring of the control electrode of the tube in the pot circle protrude and serve as part of the coupling loop for coupling to the pre-circuit.

For the sake of completeness, it should be noted that a cup circle arrangement is known in which for measuring purposes a thermal cross enclosed in a glass envelope is coupled. This is done by two insulated pins attached to form an independent double wire, which is slidable over a Bracket is connected and protrudes into the cavity. On the other side of the pins are free wire ends of the thermal cross soldered on. This does not include those that occur when coupling to an electron tube Conditions that require a fixed coupling and particularly short lines. A normal tube with a pin base is also not used.

It can be useful to also place the lead wire installed inside the tube between the Socket pin and the amplifier system or mixing system also as part of the coupling loop use. This means that the parts, their inductance and capacitance are disruptive in other arrangements Can cause resonance phenomena, switched on as a coupling loop in the controlling field, serve So no longer just as a connecting line, so that natural resonances no longer emerge in a disruptive manner.

An embodiment of the invention is after- "circuit arrangement with at least
a pot circle for reinforcement,
Generate and / or mix
of ultra-high frequency vibrations

Applicant:

Philips Patentverwaltung GmbH,
Hamburg 1, Mönckebergstr. 7th

Dipl.-Ing. Gerhard Förster, Hamburg-Stellingen,
has been named as the inventor

standing on the basis of the drawing explained in more detail, in side view, partly in section, and in plan view shows a mixer stage.

In a flat housing 1 two cup circles are divided by partitions 2 and 3, their Center conductors 4 and 5 are connected at the upper end to the housing 1 and at the lower end in the Pass over stator covers of rotary capacitors 6 and 7, the rotors of which are connected to the housing 1 sit conductively connected axis, which can be adjusted by a button 8.

The center conductors 4 and 5 are connected by means of a bridge 9 through an opening in the wall 2 and represent a tunable pre-circle band filter that is connected to an antenna via a Coupling loop 10, the ultra-high frequency oscillations are fed.

In the third, larger part of the housing 1, the oscillator circuit is attached in the form of a Lecher line 11, 12, the ends of which are also designed as variable capacitors 13 and 14, their capacitances can also be changed using the rotary knob 8.

At the upper end of the partition 3 a miniature tube 15 is attached, which contains two triode systems, which are in connection with socket pins that interact in a socket 19 with contact springs.

The tube 15 is sunk in part into the housing 1, in such a way that the connecting lines 16 between the mixing system and the associated Base pin and the corresponding contact spring - not shown for the sake of clarity, together with one of the DC voltage isolation

909 609/324

Claims (10)

serving capacitor 20, serves as a decoupling loop for the pre-circuit band filter (1 to 10); a z. B. containing a resistor, known per se direct current connection is not shown. With this arrangement, the entire connecting line is located up to the control grid of the tube 15 in the field of the second cup circle (2, 3, 5, 7), which prevents disruptive resonance phenomena on this connecting line. In many cases it is sufficient to arrange the tube outside the housing 1 and only allow the base pins and socket springs to protrude into the interior. The control grid and anode of the oscillator system of the tube 15 are connected in a manner known per se via the lines 17 and 18 to the Lecher line 11, 12, so that the oscillator vibrations are excited. The intermediate frequency oscillations are taken from the anode connection of the tube 15 via a choke 22 at a terminal 23, which can be connected in the usual way to the positive pole of a supply source via an intermediate frequency resonance circuit or a band filter; as this is common, however, it has not been presented. The supply of further supply voltages and currents to the tube 15 as well as the heating line and any necessary decoupling chokes and series resistors were not shown, since their use corresponds to the usual circuit technology and their drawing would have impaired the clarity of the picture. P Λ T IC X T Λ X S P R Ü C H E: 35 1. Circuit arrangement with at least one pot circle for amplifying, generating and / or mixing ultra-high frequency oscillations in a wide frequency range using a normal electron tube with a pin base, e.g. B. a miniature tube in all-glass technology, characterized in that the base pin and the socket spring of the control electrode of the tube (15) protrude into the pot circle and serve as part of the coupling loop for coupling to the pre-circuit. 2. Circuit arrangement according to claim 1, characterized in that also within the Tube attached lead wire between the socket pin and the amplifier system or mixer system serves as part of the coupling loop. 3. Circuit arrangement according to claim 1 or 2, characterized in that a pot circle (1, 2, 3, 5, 7) serves as the pre-circle and the tube (15) is arranged directly on its outside, at least with the base pins protruding into the interior is. 4. Circuit arrangement for mixing according to claim 1 to 3, characterized in that the pre-circuit and oscillator circle are concentric or rectangular and are arranged such that they are immediately adjacent at the point where the tube is attached. 5. Circuit arrangement according to claim 4, characterized in that the pre-circuit and the oscillator circuit are designed as pot circles with a common wall and the tube is arranged in such a way is that the grid connection of the mixing system in the pre-circuit, which for the oscillator However, the connections used protrude into the oscillator circuit. 6. Circuit arrangement according to claim 4 or 5, characterized in that the oscillator circuit is designed in the manner of a Lecher line, which is preferably between the grid and The anode of the oscillator tube is connected. 7. Circuit arrangement according to claim 6, characterized by a double tube, preferably a double triode, from which the grid connection pin of the mixing system in the pre-circuit, however, the connecting pins for the grid and anode of the oscillator system protrude into the oscillator circuit. 8. Circuit arrangement according to claim 6, characterized in that no additional coupling is attached between the mixer and oscillator system. 9. Circuit arrangement according to claim 4 to 8, characterized in that the pre-circuit and / or Oscillator circuit are capacitively tunable. 10. Circuit arrangement according to claim 4 to 8, characterized in that the circles, preferably the oscillator circuit, have a high circular quality. 1. Circuit arrangement according to one of the preceding claims, characterized in that the pre-circuit is designed as a band filter. Considered publications:
German Patent No. 662 148;
U.S. Patent No. 2,417,542;
Philips Research Reports 2, 1947, pp. 126 to 135. 1 sheet of drawings © 909 609/324 8.59