JPH01153722U - - Google Patents
Info
- Publication number
- JPH01153722U JPH01153722U JP5143488U JP5143488U JPH01153722U JP H01153722 U JPH01153722 U JP H01153722U JP 5143488 U JP5143488 U JP 5143488U JP 5143488 U JP5143488 U JP 5143488U JP H01153722 U JPH01153722 U JP H01153722U
- Authority
- JP
- Japan
- Prior art keywords
- oscillation
- circuit
- amplifier
- crystal
- amplitude detection
- 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.)
- Pending
Links
- 230000010355 oscillation Effects 0.000 claims description 14
- 239000013078 crystal Substances 0.000 claims description 7
- 239000003990 capacitor Substances 0.000 claims description 3
- 238000001514 detection method Methods 0.000 claims 4
- 238000010586 diagram Methods 0.000 description 2
Description
第１図は本考案の水晶発振回路を示す回路図、
第２図は第１図の各部波形を示すタイミングチヤ
ート、第３図は従来の水晶発振回路を示す回路図
である。
３，１６……ＮＡＮＤ回路、５……帰還抵抗、
１０……インバータ、１３……水晶振動子、１４
……入力コンデンサ、１５……出力コンデンサ、
２１……駆動回路。
Figure 1 is a circuit diagram showing the crystal oscillation circuit of the present invention.
FIG. 2 is a timing chart showing waveforms of various parts in FIG. 1, and FIG. 3 is a circuit diagram showing a conventional crystal oscillation circuit. 3, 16...NAND circuit, 5...Feedback resistor,
10...Inverter, 13...Crystal resonator, 14
...Input capacitor, 15...Output capacitor,
21...Drive circuit.
Claims (1)
と、負荷容量と、更に前記第１の増幅器と並列接
続された第２の増幅器とを設けた水晶発振回路に
おいて、発振振幅を検出する発振振幅検出回路と
、前記発振振幅検出回路の出力信号及び発振制御
信号に基づいて前記第２の増幅器を駆動する駆動
回路とを設けたことを特徴とする水晶発振回路。 (2) 前記発振振幅検出回路は、論理回路より成
ることを特徴とする請求項(1)記載の水晶発振回
路。 (3) 前記駆動回路は、前記発振振幅検出回路の
出力信号及び前記発振制御信号に基づいて駆動さ
れるフリツプフロツプと、前記発振制御信号及び
前記フリツプフロツプの出力信号に基づいて駆動
される論理回路より成ることを特徴とする請求項
(1)記載の水晶発振回路。[Claims for Utility Model Registration] (1) A crystal including a first amplifier, a feedback resistor, a crystal resonator, a load capacitor, and a second amplifier connected in parallel with the first amplifier. An oscillation circuit comprising: an oscillation amplitude detection circuit for detecting oscillation amplitude; and a drive circuit for driving the second amplifier based on an output signal of the oscillation amplitude detection circuit and an oscillation control signal. Oscillation circuit. (2) The crystal oscillation circuit according to claim (1), wherein the oscillation amplitude detection circuit is comprised of a logic circuit. (3) The drive circuit includes a flip-flop that is driven based on the output signal of the oscillation amplitude detection circuit and the oscillation control signal, and a logic circuit that is driven based on the oscillation control signal and the output signal of the flip-flop. A claim characterized in that
The crystal oscillation circuit described in (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5143488U JPH01153722U (en) | 1988-04-15 | 1988-04-15 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5143488U JPH01153722U (en) | 1988-04-15 | 1988-04-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01153722U true JPH01153722U (en) | 1989-10-23 |
Family
ID=31277458
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5143488U Pending JPH01153722U (en) | 1988-04-15 | 1988-04-15 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01153722U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51123044A (en) * | 1975-04-21 | 1976-10-27 | Hitachi Ltd | Starting circuit in the oscillation circuit |
-
1988
- 1988-04-15 JP JP5143488U patent/JPH01153722U/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51123044A (en) * | 1975-04-21 | 1976-10-27 | Hitachi Ltd | Starting circuit in the oscillation circuit |
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