JPH0419027U

JPH0419027U -

Info

Publication number: JPH0419027U
Application number: JP5861690U
Authority: JP
Priority date: 1990-06-01
Filing date: 1990-06-01
Publication date: 1992-02-18

Description

[Brief explanation of the drawing]

第１図はこの考案の一実施例によるチヤージポ
ンプ回路の回路図、第２図は第１図の動作を説明
する波形図、第３図は従来のチヤージポンプ回路
の回路図、第４図は第３図の動作を説明する波形
図、第５図はチヤージポンプ回路の使用されるＰ
ＬＬ回路の構成を示すブロツク図、第６図は第５
図の位相比較器の動作を説明する為のタイムチヤ
ートである。１……電源、４……出力端子、５，６，７，８
……ＮＰＮトランジスタ、９，１０，１６……定
電流源、１１，１２，１３，１４……入力端子、
１５……接地、１７，１９……抵抗、１８，２０
……ＰＮＰトランジスタ。なお、図中、同一符号
は同一、又は相当部分を示す。 Fig. 1 is a circuit diagram of a charge pump circuit according to an embodiment of this invention, Fig. 2 is a waveform diagram explaining the operation of Fig. 1, Fig. 3 is a circuit diagram of a conventional charge pump circuit, and Fig. 4 is a circuit diagram of a conventional charge pump circuit. A waveform diagram explaining the operation of the figure, Figure 5 shows the P used in the charge pump circuit.
A block diagram showing the configuration of the LL circuit, FIG.
This is a time chart for explaining the operation of the phase comparator shown in the figure. 1...Power supply, 4...Output terminal, 5, 6, 7, 8
...NPN transistor, 9, 10, 16... constant current source, 11, 12, 13, 14... input terminal,
15...Grounding, 17,19...Resistance, 18,20
...PNP transistor. In addition, in the figures, the same reference numerals indicate the same or equivalent parts.

Claims

[Scope of utility model registration request]

Transistors 20 and 18 constituting a current mirror through which constant current source 16 flows and their emitter resistor 17
, 19 and the collector of the transistor 18 are connected to the charge pump output 4 and the collector of the transistor 8, and the transistor 7 forming a differential pair with the transistor 8, and the transistor 5 and the differential pair whose collector is connected to the emitter of the transistor 18. A charge pump circuit comprising: a transistor 6 comprising a transistor 6;