New TCXO for GPS Receivers

KDS Daishinku Corporation offers a new version of temperature compensated crystal oscillator (TCXO) for GPS-related applications — the DSB321SDA/DSB221SDA. KDS Daishinku currently produces a high-precision surface mount device (SMD) TCXO, DSB321SD. With the new TCXO, phase noise performance of the output signal has improved to a typical figure of 94dBc/Hz at10Hz and -117dBc/Hz at100Hz with an output frequency 16.369MHz while retaining the DSB321SD’s frequency temperature stability of ±0.5ppm at -30C to +85C, according to the company.

KDS Daishinku Corporation offers a new version of temperature compensated crystal oscillator (TCXO) for GPS-related applications — the DSB321SDA/DSB221SDA. KDS Daishinku currently produces a high-precision surface mount device (SMD) TCXO, DSB321SD. With the new TCXO, phase noise performance of the output signal has improved to a typical figure of 94dBc/Hz at10Hz and -117dBc/Hz at100Hz with an output frequency 16.369MHz while retaining the DSB321SD’s frequency temperature stability of ±0.5ppm at -30C to +85C, according to the company. At the same time, the available supply voltage range has also been lowered down to 1.7 volts to enable GPS receivers to use the TCXO at 1.8V. (The available supply voltage range of the existing product is 2.3–5.5V). In addition to these features, a built-in standby function (also called an “on-off” or “enable-disable” function) is also integrated into the new TCXO as an option. The standby function controls the switching of the TCXO by external standby signals, reportedly eliminating the need for external power management ICs or external LDOs (low dropout regulators) in the system, reducing board space needs, and significantly simplifying the design around the TCXO. KDS Daishinku Corporation, Kakogawa, Hyogo, Japan.