JPS59145989A - Portable type electronic timepiece - Google Patents

Abstract

PURPOSE:To make a portable electronic timepiece have a sound recording and a reproducing function with small-sized, light constitution having a small frequency for replacing a battery by utilizing a semiconductor storage to digital store. CONSTITUTION:A digital voice which is inputted from a microphone and passes through an A/D converter 4 is stored in a semiconductor storage device 1 which is subjected to access by an address counter responding to a keyboard. This storage is reproduced by a loudspeaker 7 through a D/A converter 5. Accordingly, a magnetic tape, etc. which require quick traversing and rewinding become unnecessary, and sound recording and reproducing functions can be added to a portable electronic timepiece by the small-sized, light constitution having a small frequency for replacing a battery.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a portable electronic watch having a voice recording and playback function.

An object of the present invention is to provide a portable electronic timepiece that is small, lightweight, and has a recording/playback function that requires less frequent battery replacement.

In conventional audio storage devices, a magnetic tape recording method has generally been used. Meanwhile, recently, calculators.

2. Description of the Related Art As radios and the like become smaller, there is an increasing demand for smaller audio recording devices, that is, tape recorders. However, conventional tape recording methods are not suitable for small size. First, advanced mechanisms such as motors that control the rotation of the tape are difficult to reduce in size and weight.

Second, since mechanisms such as motor relays are required to operate, a considerable amount of power is consumed, and the lifespan of batteries, which are the power source for portable devices, is too short, reducing the product value. Sixth, miniaturization places a load on the mechanism, and at the same time, tapes are unavoidably miniaturized, resulting in poor playback audio quality. Fourth, it takes time to search because the tape is fast forwarded or reversed.

The present invention eliminates these drawbacks and enables an electronic timepiece having a recording/playback function by using a semiconductor memory instead of the conventional magnetic tape as a storage medium.

The block diagram in FIG. 1 shows the recording/reproducing apparatus of the present invention, and 1 is a memory area. The address of this memory is determined by an address counter 8. The clock signal OL is sent to the A/D converter 4. It serves as a sampling clock for the D/A converter 5 and at the same time as an address counter clock to control data input/output of the memory in synchronization with the two converters. The audio signal (input from micro 2) is amplified by amplifier 3,
vcs, 'D'J' Beta 4 [digitalized and stored in memory 1. This is the recording operation. The data output is converted into a D/converter 5Kjp analog audio signal, and the Noupika 7 is driven by the amplifier 6vC. In addition, the boat 10 receives signals from the keyboard or the switch 9 to control recording, playback, and search, and also plays the role of outputting an address display to the display 11.

When an area address is specified on the keyboard 9, the specified address is immediately called up, and there is no need for fast forwarding or reversing functions as with a tape, so there is no waiting time. At this time, if a microcomputer with a built-in program is used instead of the address counter 8, even more advanced functions will be possible. For example, automatic recording, playback, repeat, automatic search, etc. Furthermore, if the I10 boat 10 has a register function, it can hold the output from the clock circuit using a common clock signal, and can also notify the time of 9 hours on the display. In other words, it is possible to share the clock function and simultaneously store one hour of recording time in the memory and display it on the display during playback.

FIG. 2 shows one practical sub-example of the memory of the invention. Audio memory needs to be non-volatile in nature.

When using such a (3MOS memory), the static current is extremely small, so non-volatility is possible due to the extremely low power dissipation.Also, the operating power is low when the addressing frequency is at most 10V.
Since it is about KH2, it becomes 10μ8 or less at 1.5V.

BZT and BZT are data input/output lines, and A is an address line that controls transistors 14 and 15. i2,
13 constitutes an inverter flip-flop for storage.

FIG. 6 shows another practical example of memory as an audio storage medium. Reference numeral 16 denotes a floating gate, which is buried in the insulation film 17. Drain P” U substrate N
- When a voltage higher than that at which avalanche breakdown occurs is applied, high-energy electrons cross the barrier of the gate film, become floating, and are injected into the gate, where they remain for more than 10 years. The channel resistance of the transistor is determined by this injection charge equation.

Figure 4 shows this relationship. That is, avalanche voltage Vav
, or more is applied to the drain to control the channel resistance Reff. The injection time is approximately 100 μsec. Further, Vav can be up to about 5V.

Figure 5 shows audio recording 9 using this nonvolatile memory cell.
An example of the configuration of a playback device is shown. Audio human power AZn is amplifier 18
The signal is amplified by the buffer 19, and the bias is matched with that of the memory cell, and the signal is input to the cell. The cell 22 is selected by an address signal A' composed of a memory transistor 23 and an address control transistor 24. E is a charge erasing signal. For reproduction, the ERI transistor 25 is turned on in Q and E, and the channel resistance Reff is directly detected from the load resistance ReK and outputted to the nupika 21 via the amplifier 20. The memory transistor used here is a floating gate CFAMO8.
) type, for example, any non-volatile material such as tunnel injection MNO8 may be used. In the embodiment mentioned here, the memory is directly accessed by an analog signal, and the A/D converter 4 and D/A converter 5 in the first (2) can be omitted, but digitally, for example, the 0M0EI of the previous example
1 bit of memory is simply converted to 1 bit of non-volatile memory.
There is no problem at all with the replacement method.

The present invention uses a semiconductor as a memory element, and the required capacity is approximately 16K btt, 7
In the analog storage method, it is zxb+,t/second.For example, using a non-volatile memory of 256K btt/chip using a 2 μm pattern, it is possible to record audio with a storage time of 15 minutes using 6 chips. This has been made compact enough to fit in a wristwatch. Therefore, the size can be sufficiently reduced and the weight can be significantly reduced.

Also, the power consumption during recording and playback is comparable to that of ordinary silver 1. The power has been reduced to the point where it can be used even in ponds. With the above configuration, is it possible to record and playback functions on a mobile watch for the first time? It was possible to add it.

Further, the control IC used in the present invention will be more convenient if the functions of the watch are shared.

For example, in addition to the voice storage area, memory also stores time.

It can also be used to store time, calculation steps or results. Furthermore, if the controller is a microcomputer, the functions of one clock can be controlled by a series of software, making it possible to integrate them into the same chip. In addition, the display body can be used both to display voice addresses and to display a clock, and by converting the entire circuit into a semiconductor, it is possible to produce a portable electronic clock with a low commercial price.

[Brief explanation of the drawing]

FIG. 1 shows a block diagram of the invention. 1 is a semiconductor storage device, 8 is an address controller, 9 is a keyboard, 10
is the I10 port, and 11 is the display. Further, 2 and 6 are audio input sections, 4 is an A/D converter, 5 is a D/A converter, and 6.7 is an audio output section. FIG. 2 shows a 0MO8 memory cell. FIG. 3 shows an example of a floating gate type (FAMoe) nonvolatile memory transistor. Figure 4 shows the drain applied voltage and channel equivalent resistance He f
Relationship diagram of f. FIG. 5 shows the configuration II of an audio recording/reproducing device using nonvolatile memory cells 22. 21 is Nupika. Applicant Suwa Seikosha Co., Ltd. Agent Patent Attorney Mogami Tsutomu 10/7 Easy/Shoulders - Tsunoji 3 Diagram Q Easy Rizu No. 4

Claims (1)

[Claims] An A/D converter that converts an audio signal into a digital signal, a semiconductor storage device that stores the digital code, a D/A converter that converts the digital signal stored in the semiconductor storage device into an analog signal, and the analog signal. What is claimed is: 1. A portable electronic watch, characterized in that it is equipped with a recording and reproducing device consisting of a speaker that reproduces as audio.