发明名称 |
Phase-shift oscillator having ladder-type saw filter feedback circuit |
摘要 |
An oscillation circuit of phase-shift type includes a surface acoustic wave filter in a feedback circuit, the surface acoustic wave filter having first and second one-port surface acoustic wave resonators of different resonance frequencies connected in a ladder configuration. The oscillation circuit has a high C/N ratio with a large bandwidth of variable frequency and can be fabricated in a small size with low costs.
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申请公布号 |
US5874866(A) |
申请公布日期 |
1999.02.23 |
申请号 |
US19970937380 |
申请日期 |
1997.09.25 |
申请人 |
FUJITSU LIMITED;FUJITSU TOWA ELECTRON LIMITED |
发明人 |
SATOH, YOSHIO;IKATA, OSAMU;MATSUDA, TAKASHI;TAKAHASHI, YOSHITAKA;AVRAMOV, IVAN DIMITROV |
分类号 |
H03B5/30;H03B5/32;H03H9/25;H03H9/64;(IPC1-7):H03B5/32 |
主分类号 |
H03B5/30 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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