JPH01280908A - High frequency hybrid integrated circuit - Google Patents

Abstract

PURPOSE:To eliminate the need for earthing of the circuit in terms of high frequency and to attain broad band by providing balanced type input terminals and balanced type output terminals in pairs through the balanced configuration. CONSTITUTION:High frequency transistors(TR) are configurated as push-pull to constitute the circuit to be a balanced type circuit. Thus, the entire hybrid integrated circuit is formed to be balanced type in terms of high frequency and no earthing is required. However, it is required for balance-unbalance conversion by external balance-unbalance conversion circuit 6a, 6b. Since the matching circuit constituted to be of balanced type has a lower Q of the circuit in comparison with the unbalanced matching circuit, broad band configuration is attained.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a high frequency hybrid integrated circuit used for power amplification in, for example, a transmitting section of a wireless communication device or a high frequency power amplification stage.

[Conventional technology]

FIG. 5 is a block diagram showing how to use a conventional high-frequency hybrid integrated circuit (unbalanced high-frequency power amplifier circuit) (high-frequency manual power, output connection method), and FIG. 6 is an equivalent circuit diagram thereof. In these figures, 5 is a DC power supply terminal for supplying DC power, 7 is a conventional unbalanced high frequency hybrid integrated circuit, 8 is an unbalanced input terminal, 9 is an unbalanced output terminal, 10 is a ground terminal using a ground fin, lead, etc.

Conventional unbalanced high frequency hybrid integrated circuit 7 shown in FIG.
As shown in the equivalent circuit diagram of FIG. 6, the ground terminal (emitter) of the transistor and most of the circuit components are grounded, and the ground is part of the circuit.

It was also necessary to provide grounding when using it for radio equipment.

[Problem to be solved by the invention]

In the conventional high-frequency hybrid integrated circuit 7 described above, the circuit is constructed of an unbalanced type that requires grounding, so it will not operate unless it is grounded, and the quality of the grounding depends on the frequency of the circuit. Properties and stability may be affected.

The present invention was made to solve this problem, and an object of the present invention is to obtain a high frequency hybrid integrated circuit that does not require grounding and is capable of wideband power amplification.

(Means for Solving the Problems) A high frequency hybrid integrated circuit according to the present invention is configured in a balanced type and includes a pair of balanced input terminals and a balanced output terminal.

[Function] According to the present invention, there is no need for grounding, and the Q of the matching circuit is reduced.

[Embodiment] FIG. 1 is a block diagram showing an embodiment of the high frequency hybrid integrated circuit of the present invention, and FIG. 2 is an equivalent circuit diagram thereof.

In these figures, 1 is a balanced high-frequency hybrid integrated circuit of the present invention, 2a and 2b are a pair of balanced input terminals, 3a and 3b are a pair of balanced output terminals, and 4 is a DC type a negative voltage or ground terminal, 5 a DC power supply terminal for supplying DC power to the high frequency hybrid integrated circuit 1;
Reference numerals a and 6b are balanced-unbalanced conversion circuits such as high-frequency transformers, which are external circuits of the high-frequency hybrid integrated circuit 1.

That is, as shown in the equivalent circuit diagram of FIG. 2, the high-frequency hybrid integrated circuit of the present invention has high-frequency transistors in a bush-pull configuration and the circuit is configured in a balanced type, so that the entire hybrid integrated circuit can be made into a high-frequency balanced type. This eliminates the need for grounding. However, the balanced-unbalanced conversion for this purpose needs to be performed by external balanced-unbalanced conversion circuits 6a, 6b. Further, since the matching circuit configured as a balanced type as described above can have a lower Q than an unbalanced matching circuit, it is possible to widen the band.

In the case of an unbalanced matching circuit as shown in Fig. 3(a), R=r (1+Q+'), Q+ =ωLl/r・・
... (1) In the case of a balanced matching circuit as shown in Figure 3(b), R=2r (1+Q2'), Q2 = ωL2/2r...
... (2) This is because Q2<Q+.

In the above embodiment, a pair of balanced terminals are used for both the human power and the output, but as shown in FIG. 4, a configuration having multiple pairs of balanced terminals is also possible.

(Effects of the Invention) As explained above, the present invention is configured in a balanced type and includes a pair of balanced input terminals and a balanced output terminal, so there is no need for high frequency grounding of the circuit, and This has the effect of making broadband possible.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing an embodiment of the high frequency hybrid integrated circuit of the present invention, FIG. 2 is an equivalent circuit diagram of the high frequency hybrid integrated circuit of FIG. 1, and FIG. 3 is a diagram showing the Q of the matching circuit. Figure, 4th
5 is a diagram showing another embodiment of the present invention, FIG. 5 is a diagram showing a conventional high frequency hybrid integrated circuit, and FIG. 6 is an equivalent circuit diagram of the high frequency hybrid integrated circuit shown in FIG. In the figure, 1 is a balanced high frequency hybrid integrated circuit of the present invention, 2a and 2b are balanced input terminals, 3a and 3b are balanced output terminals, 4 is a negative voltage or ground terminal, 5 is a DC power supply terminal, 6a and 6b are balanced-unbalanced conversion circuits. Note that the same reference numerals in each figure indicate the same or corresponding parts. Agent Masuo Oiwa (2 others) Figure 3 Figure 4 Figure 5 Figure 6 L --,, ---J Procedural amendment (voluntary) 1. Indication of the incident Patent Application No. 110802/1983 2.
Invention (7) Title: High-frequency hybrid integrated circuit 3, relationship to the amended case Patent applicant address: 2-2-3 Marunouchi, Chiyoda-ku, Tokyo. Name (601) Mitsubishi Electric Corporation Representative Moriya Shiki 4, Agent Address 2-2-3-5 Marunouchi, Chiyoda-ku, Tokyo
, Correction drawing 6, Contents of correction Among the drawings, FIGS. 1 and 6 will be corrected as shown in the attached sheet. Above Figure 1 Figure 6

Claims (1)

[Claims] A high frequency hybrid integrated circuit configured in a balanced manner and comprising a pair of balanced input terminals and a balanced output terminal.