JPH03272204A - Voltage controlled oscillator - Google Patents

Abstract

PURPOSE:To use a front side layer and a rear side layer effectively and the make the size small by forming a resonance spiral electrode to an inner layer of dielectric multi-layer base comprising at least four layers or over. CONSTITUTION:An oscillation circuit consists of a spiral electrode 4 for resonance of a 2nd layer shown in figure (b) connecting to oscillation components 2 provided to a front side layer of a dielectric four-layer board 1 via a throughhole 3 electrically and a buffer circuit consisting of buffer components 5 is formed on a rear side layer shown in figure (d). A ground electrode 7 is formed to the entire part of a 3rd layer shown in figure (c) except the surrounding of a throughhole 6 connecting electrically the oscillation circuit and the buffer circuit. Thus, there is no hindrance to the pattern constitution of other circuits and the arrangement of electronic components.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a voltage controlled oscillator used in various communication equipment.

2. Description of the Related Art Conventionally, voltage controlled oscillators used in various communication devices have a second oscillator on the front side of a dielectric double-sided substrate 11, as shown in FIG.
A spiral electrode 14 for resonance and an oscillating part 12 are provided as shown in FIG. connected. Alternatively, as shown in FIG. 3, a resonance spiral electrode 24 is provided on the surface side of the dielectric double-sided substrate 21 as shown in FIG. 3(a).
An oscillation component 22 and a buffer component 26 are provided, and a ground electrode 25 is formed on the back side as shown in FIG. 3(b).

Problems to be Solved by the Invention In such a voltage controlled oscillator, since the resonant spiral electrode 14.24 occupies a large area on the dielectric double-sided substrate 11. There was a problem that it caused trouble in the array.

Means for Solving the Problem In order to solve this problem, the present invention provides an oscillation component on the surface layer of a dielectric multilayer board consisting of at least four layers,
A resonance spiral electrode is formed on the lower layer, a ground electrode is formed on the lower layer, and a buffer component is provided on the back layer.

action 3, consisting of at least four layers due to the structure.

By forming the resonant serpentine electrode on the inner layer of the dielectric multilayer substrate, there will be no interference with other circuit pattern configurations and the arrangement of electrical components.

Example As shown in FIG. 1, in this example, the oscillation component 2 provided on the surface layer of the dielectric four-layer substrate 1 shown in FIG. 1(a) is electrically connected by a through hole 3. An oscillation circuit is constructed by the resonant spiral electrode 4 in the second layer shown in b), and a buffer circuit is constructed by the buffer component 5 in the back layer in FIG. In the third layer, a ground electrode 7 is formed on the entire surface except around the through hole 6 that electrically connects the oscillation circuit and the buffer circuit.

Effects of the Invention As described above, according to the present invention, by forming a resonant spiral electrode on the inner layer of a dielectric multilayer substrate having at least four layers, the front layer and the back layer can be used effectively. , it becomes possible to miniaturize voltage controlled oscillators. Furthermore, since the oscillation component and the buffer component are shielded by the ground electrode in the inner layer, deterioration of the oscillator characteristics can be prevented and highly stable oscillation can be obtained.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing the front surface, second layer, third layer, and back side of a dielectric four-layer substrate according to an embodiment of the present invention; :1, respectively
FIG. 3 is a perspective view showing the front and back surfaces of the double-sided substrate. 1... Dielectric 4-layer board, 2... Oscillation component, 3... Through hole, 4... Spiral shaped electrode for resonance, 5...・Buffer parts, 6・
...Through pole, 7...Earth electrode.

Claims (1)

[Claims] Voltage control in which an oscillation component is provided on the surface layer of a dielectric multilayer board consisting of at least four layers, a resonant spiral electrode is formed on the lower layer, a ground electrode is formed on the lower layer, and a buffer component is provided on the back layer. oscillator.