SJ/Z 9153.3-1987
Second supplement to IEC368 (1971) of piezoelectric filters Chapter 3 Guide to the use of piezoelectric filters (English Version)
- Standard No.
- SJ/Z 9153.3-1987
- Language
- Chinese, Available in English version
- Published By
- Professional Standard - Electron
- Status
- 2010-02
- Latest
- SJ/Z 9153.3-1987
- Scope
- With the research and development of stable piezoelectric ceramic materials, a new and quite promising field has emerged, that is, the use of piezoelectric ceramic vibrators (also known as "ceramic vibrators") to design high-quality, small and cheap filters device. With the acquisition of ceramic oscillators with high coupling coefficients, high quality factors and sufficient stability, it is possible to design ceramic filters that replace conventional LC filters, mechanical filters and other new applications. Piezoelectric ceramic filters are currently widely used in communications (IF amplifiers for communication receivers) and instruments that generate a set of reference frequencies. They are also used in IF amplifiers for telemetry devices, measurement and broadcast receivers. Although the technical specifications of these filters are very different, most of the above needs can be met with several standard types of ceramic filters. This standard applies to passive bandpass filters operating at frequencies from a few kHz to over 10 MHz, which are commercially available as discrete and stand-alone units. Filters integrated into a large system are not considered here. The filters considered in this guide are limited to two-terminal filters utilizing passive linear components. This brief standard does not address theory. It also does not cover all contingencies that may occur in actual circumstances. This guide focuses on some basic issues that the user must consider before ordering a filter for a new application. Doing so will ensure that users avoid unsatisfactory performance. Product loose-leaf specifications such as IEC standards (of which this guide is a part) and national technical specifications or data issued by manufacturers will specify the available reference frequency, passband width, ripple, squareness factor, termination impedance, etc. index. These tables cover a wide range of ceramic filters with standard performance. It must be emphasized that wherever possible the user should select ceramic filters according to these specifications, even if minor modifications to the circuit are required in order to be able to use standard filters. This is especially true when choosing a reference frequency.
SJ/Z 9153.3-1987 history
- 1970 SJ/Z 9153.3-1987 Second supplement to IEC368 (1971) of piezoelectric filters Chapter 3 Guide to the use of piezoelectric filters
