JPH0351565U - - Google Patents
Info
- Publication number
- JPH0351565U JPH0351565U JP11196889U JP11196889U JPH0351565U JP H0351565 U JPH0351565 U JP H0351565U JP 11196889 U JP11196889 U JP 11196889U JP 11196889 U JP11196889 U JP 11196889U JP H0351565 U JPH0351565 U JP H0351565U
- Authority
- JP
- Japan
- Prior art keywords
- zoom
- circuit
- switch
- audio signal
- wide
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000005236 sound signal Effects 0.000 claims description 6
- 238000010586 diagram Methods 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
Description
第１図ないし第３図は本考案の一実施例に係り
、第１図は電動ズーム機能付きビデオカメラの概
略的な外観図、第２図は電動ズーム機能に関係す
る回路構成を示すブロツク図、第３図は動作説明
に供するタイムチヤートである。第４図および第
５図は従来例に係り、第４図はビデオカメラの概
略的な外観図、第５図は電動ズーム機能に関係す
る回路を示すブロツク図である。
２……ズームレンズ、４……ズームモータ、５
……広角方向スイツチ、６……望遠方向スイツチ
、７……ズームスイツチ、８……ズーム方向指定
回路、９……ズームモータ駆動回路、１０……マ
イク、１１……外部オーデイオ入力端子、１２…
…オーデイオ信号増幅回路、１３……オーデイオ
信号感応回路、１４……オーデイオ信号検波回路
、１５……比較回路、１６……第１の差動増幅器
、１７……第２差動増幅器、１８……遅延回路、
１９……バツフア回路、２０……アナログスイツ
チ、２１……Ｔフリツプフロツプ、２２……小刻
みシフト操作スイツチ。
Figures 1 to 3 relate to one embodiment of the present invention, with Figure 1 being a schematic external view of a video camera with an electric zoom function, and Figure 2 being a block diagram showing the circuit configuration related to the electric zoom function. , FIG. 3 is a time chart for explaining the operation. 4 and 5 relate to a conventional example, with FIG. 4 being a schematic external view of a video camera, and FIG. 5 being a block diagram showing a circuit related to the electric zoom function. 2...Zoom lens, 4...Zoom motor, 5
... Wide-angle direction switch, 6 ... Telephoto direction switch, 7 ... Zoom switch, 8 ... Zoom direction designation circuit, 9 ... Zoom motor drive circuit, 10 ... Microphone, 11 ... External audio input terminal, 12 ...
...Audio signal amplification circuit, 13...Audio signal sensitive circuit, 14...Audio signal detection circuit, 15...Comparison circuit, 16...First differential amplifier, 17...Second differential amplifier, 18... delay circuit,
19...Buffer circuit, 20...Analog switch, 21...T flip-flop, 22...Small shift operation switch.
Claims (1)
か望遠方向スイツチかに応じてズームモータに供
給する電流方向を広角方向または望遠方向に指定
するズーム方向指定回路を備えた電動ズーム機能
付きビデオカメラにおいて、 外部オーデイオ入力端子から入力したオーデイ
オ信号がスレツシユレベル以上であるときに、広
角方向指定と望遠方向指定とを交互に繰り返す小
刻み往復シフト指令を前記ズーム方向指定回路に
対して与えるオーデイオ信号感応回路と、 このオーデイオ信号感応回路と前記ズーム方向
指定回路との間に挿入された小刻みシフト操作ス
イツチとを備えたことを特徴とする電動ズーム機
能付きビデオカメラ。[Claims for Utility Model Registration] Electric zoom equipped with a zoom direction designation circuit that specifies the direction of current supplied to the zoom motor to either the wide-angle direction or the telephoto direction depending on whether the operated zoom switch is a wide-angle direction switch or a telephoto direction switch. In a video camera with a function, when an audio signal input from an external audio input terminal is at a threshold level or higher, a small reciprocating shift command that alternately repeats wide-angle direction designation and telephoto direction designation is sent to the zoom direction designation circuit. What is claimed is: 1. A video camera with an electric zoom function, comprising: an audio signal sensitive circuit for providing a zoom signal; and a small shift operation switch inserted between the audio signal sensitive circuit and the zoom direction specifying circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11196889U JPH0646129Y2 (en) | 1989-09-25 | 1989-09-25 | Video camera with electric zoom function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11196889U JPH0646129Y2 (en) | 1989-09-25 | 1989-09-25 | Video camera with electric zoom function |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0351565U true JPH0351565U (en) | 1991-05-20 |
| JPH0646129Y2 JPH0646129Y2 (en) | 1994-11-24 |
Family
ID=31660428
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11196889U Expired - Fee Related JPH0646129Y2 (en) | 1989-09-25 | 1989-09-25 | Video camera with electric zoom function |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0646129Y2 (en) |
-
1989
- 1989-09-25 JP JP11196889U patent/JPH0646129Y2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0646129Y2 (en) | 1994-11-24 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |