JPH0397682U

JPH0397682U -

Info

Publication number: JPH0397682U
Application number: JP503390U
Authority: JP
Priority date: 1990-01-25
Filing date: 1990-01-25
Publication date: 1991-10-08

Description

[Brief explanation of the drawing]

第１図は考案の一実施例を示す超音波診断装置
の受信部の概略構成図、第２図ａ〜ｃは本考案の
概念を説明する図、第３図ａ〜ｃは第２の実施例
の動作を説明する受信初段部の概略構成図である
。図において、１は探触子、１ａ_１〜１ａ_６４は
エレメント、２は切替手段、３ａ_１〜３ａ_６４は
初段アンプ、Ｑ_１はトランジスタ、Ｃ_１〜Ｃ_４は
コンデンサ、Ｑ_２はトランジスタである。 Fig. 1 is a schematic configuration diagram of a receiving section of an ultrasonic diagnostic apparatus showing an embodiment of the invention, Figs. 2 a to c are diagrams explaining the concept of the invention, and Figs. 3 a to c show a second embodiment FIG. 2 is a schematic configuration diagram of a receiving initial stage section for explaining the operation of an example. In the figure, 1 is a probe, 1a ₁ to 1a ₆₄ are elements, 2 is a switching means, 3a ₁ to 3a ₆₄ are first stage amplifiers, Q ₁ is a transistor, C ₁ to _{C 4} are capacitors, and Q ₂ is a transistor. .

Claims

[Claims for Utility Model Registration] (1) A plurality of arrayed transducers that receive echoes reflected from the subject in response to pulsed wave energy irradiated onto the subject through a predetermined aperture; , a first-stage amplifier group that corresponds to the number of the vibrators and amplifies the output signal thereof; and a first-stage amplifier group arranged between the vibrator and the first-stage amplifier group,
Variable aperture means for variable aperture reception, and when the variable aperture means has its aperture width narrower than the maximum value in order to receive echoes from short or medium distances, surplus When the variable aperture means is connected in parallel with the first-stage amplifier and its aperture width is set to the maximum value in order to receive echoes from a long distance, the plurality of transducers and the first-stage amplifier group are individually connected. 1. A low-noise, low-consumption array receiver, characterized in that it has a pair of switching means for connecting. (2) A claim further comprising control means for setting a condition for delay addition in a receiving beamformer of the output of the parallel-connected first-stage amplifier group to be equal to the output of the parallel-connected first-stage amplifier group by the switching means. 2. The low-noise, low-consumption array receiver according to item 1.